switch to vgc system
[fishladder.git] / fishladder.c
index d7b887d2f602bc62b0a7a2f03cb9af134a8e0cd6..f82cebeea04de390e963e0df4d29b14b172d786a 100644 (file)
@@ -1,10 +1,36 @@
 // Copyright (C) 2021 Harry Godden (hgn) - All Rights Reserved
 
-#define VG_STEAM
+#define MARBLE_COMP_VERSION 4
+//#define VG_CAPTURE_MODE
 #define VG_STEAM_APPID 1218140U
 #include "vg/vg.h"
+
+enum world_button_mode
+{
+       k_world_button_mode_once,
+       k_world_button_mode_toggle
+};
+
+struct world_button
+{
+       v2i position;
+
+       float light_target, light, extra_light;
+       int state;
+
+       enum world_button_mode mode;
+};
+
+enum world_button_status
+{
+       k_world_button_on_enable,
+       k_world_button_on_disable
+};
+
 #include "fishladder_resources.h"
 
+// #define STEAM_LEADERBOARDS
+
 // CONSTANTS
 // ===========================================================================================================
 
@@ -35,7 +61,15 @@ enum e_world_button
        k_world_button_none = -1,
        k_world_button_sim = 0,
        k_world_button_pause = 1,
-       k_world_button_wire_mode = 2
+       k_world_button_speedy = 2,
+       k_world_button_settings = 3
+};
+
+enum e_game_state
+{
+       k_game_state_main,
+       k_game_state_settings,
+   k_game_state_update
 };
 
 #define FLAG_CANAL             0x1
@@ -46,12 +80,15 @@ enum e_world_button
 #define FLAG_INPUT             0x10
 #define FLAG_OUTPUT            0x20
 #define FLAG_WALL              0x40
+#define FLAG_EMITTER           0x80
 
 #define FLAG_FLIP_FLOP         0x100
 #define FLAG_TRIGGERED         0x200
 #define FLAG_FLIP_ROTATING 0x400
 #define FLAG_TARGETED  0x800
 
+#define FLAG_INPUT_NICE 0x1000
+
 /*
        0000 0   | 0001 1   | 0010 2   | 0011 3
                           |          |    |     |    |
@@ -80,27 +117,28 @@ static struct cell_description
        int is_linear;
        
        v2f trigger_pos;
+   enum sprites_auto_combine_index trigger_sprite;
 }
 cell_descriptions[] =
 {
        // 0-3
-       {},
-       { .start = {  1,  0 }, .end = { -1,  0 }, .trigger_pos = { 0.5f, 0.25f } },
-       { .start = {  0,  1 }, .end = {  0, -1 }, .trigger_pos = { 0.25f, 0.5f } },
-       { .start = {  0,  1 }, .end = {  1,  0 }, .trigger_pos = { 0.25f, 0.25f } },
+       { .trigger_pos = { 0.5f, 0.25f }, .trigger_sprite = k_sprite_brk_d },
+       { .start = {  1,  0 }, .end = { -1,  0 }, .trigger_pos = { 0.5f, 0.25f }, .trigger_sprite = k_sprite_brk_d },
+       { .start = {  0,  1 }, .end = {  0, -1 }, .trigger_pos = { 0.25f, 0.5f }, .trigger_sprite = k_sprite_brk_l },
+       { .start = {  0,  1 }, .end = {  1,  0 }, .trigger_pos = { 0.25f, 0.5f }, .trigger_sprite = k_sprite_brk_l },
        // 4-7
-       { .start = { -1,  0 }, .end = {  1,  0 }, .trigger_pos = { 0.5f, 0.25f } },
-       { .start = { -1,  0 }, .end = {  1,  0 }, .trigger_pos = { 0.5f, 0.25f }, .is_linear = 1 },
-       { .start = {  0,  1 }, .end = { -1,  0 }, .trigger_pos = { 0.5f, 0.25f } },
+       { .start = { -1,  0 }, .end = {  1,  0 }, .trigger_pos = { 0.5f, 0.25f }, .trigger_sprite = k_sprite_brk_d },
+       { .start = { -1,  0 }, .end = {  1,  0 }, .trigger_pos = { 0.5f, 0.25f }, .trigger_sprite = k_sprite_brk_d, .is_linear = 1 },
+       { .start = {  0,  1 }, .end = { -1,  0 }, .trigger_pos = { 0.5f, 0.25f }, .trigger_sprite = k_sprite_brk_d },
        { .start = {  0,  1 }, .is_special = 1 },
        // 8-11
-       { .start = {  0, -1 }, .end = {  0,  1 }, .trigger_pos = { 0.25f, 0.5f } },
-       { .start = {  1,  0 }, .end = {  0, -1 }, .trigger_pos = { 0.25f, 0.75f } },
-       { .start = {  0,  1 }, .end = {  0, -1 }, .trigger_pos = { 0.25f, 0.5f }, .is_linear = 1 },
+       { .start = {  0, -1 }, .end = {  0,  1 }, .trigger_pos = { 0.25f, 0.5f }, .trigger_sprite = k_sprite_brk_l },
+       { .start = {  1,  0 }, .end = {  0, -1 }, .trigger_pos = { 0.25f, 0.5f }, .trigger_sprite = k_sprite_brk_l },
+       { .start = {  0,  1 }, .end = {  0, -1 }, .trigger_pos = { 0.25f, 0.5f }, .trigger_sprite = k_sprite_brk_l, .is_linear = 1 },
        { },
        // 12-15
-       { .start = { -1,  0 }, .end = {  0, -1 }, .trigger_pos = { 0.75f, 0.75f } },
-       { .end = { 0, -1 }, .is_special = 1, .trigger_pos = { 0.5f, 0.75f } },
+       { .start = { -1,  0 }, .end = {  0, -1 }, .trigger_pos = { 0.5f, 0.75f }, .trigger_sprite = k_sprite_brk_u },
+       { .end = { 0, -1 }, .is_special = 1, .trigger_pos = { 0.5f, 0.75f }, .trigger_sprite = k_sprite_brk_u },
        { },
        { }
 };
@@ -129,22 +167,42 @@ struct mesh
        u32 elements;
 };
 
-struct world
+static struct world
 {
-#pragma pack(push,1)
+       // Things that are 'static', aka, initialized once
+       struct
+       {
+               struct world_button buttons[4];
+               float zoom;
+               enum e_game_state state;
+
+               struct cmp_level *lvl_to_load;
+               float lvl_load_time;
+
+               float world_transition;
+      ui_ctx world_text;
+       }
+       st;
+
        struct cell
        {
                u16 state;
                u16 links[2];
                u8 config;
-               u8 pad0;
+      i8 emit[2];
        }
        *data;
-#pragma pack(pop)
-       
+
+       struct render_cmd
+       {
+               struct cell *ptr;
+               v2i pos;
+       } 
+       *cmd_buf_tiles, *cmd_buf_specials;
+
+       u32 tile_count, tile_special_count, max_commands;
        
        int initialzed;
-       
        int sim_run, max_runs;
 
        int sim_frame, sim_target;
@@ -160,10 +218,10 @@ struct world
        {
                struct terminal_run
                {
-                       char conditions[8];
-                       char recieved[8];
+                       i8 steps[8];
+                       i8 recieved[8];
                        
-                       int condition_count, recv_count;
+                       int step_count, recv_count;
                }
                runs[8];
                
@@ -171,18 +229,11 @@ struct world
                v2i pos;
                //int id;
        }
-       *io;
-       
-       struct cell_button
-       {
-               float light_target, light;
-               int pressed;
-       }
-       buttons[4];
+       *io;    
        
        int w, h;
        
-       struct mesh shapes, numbers;
+       struct mesh shapes;
        struct mesh_wire
        {
                GLuint vao, vbo, ebo;
@@ -201,18 +252,17 @@ struct world
                v2i pos;
                v2i dir;
                enum e_fish_state state;
-               char payload;
+               i8 colour;
                int flow_reversed;
                float death_time;
                v2f physics_v;
                v2f physics_co;
        }
-       fishes[16];
+       fishes[64];
        
        int num_fishes;
        
        char map_name[64];
-       //struct career_level *ptr_career_level;
        struct cmp_level *pCmpLevel;
        
        u32 score;
@@ -222,16 +272,96 @@ struct world
        u16 id_drag_from;
        v2f drag_from_co;
        v2f drag_to_co;
+}
+world = 
+{
+       .st = 
+       {
+               .buttons = { { .mode = k_world_button_mode_toggle },
+                       { .mode = k_world_button_mode_toggle },
+                       { .mode = k_world_button_mode_toggle },
+                       { .mode = k_world_button_mode_toggle } }
+       },
+   .selected = -1
 };
 
 // Forward declerations
 // --------------------
 
+// Utility functions
+// -----------------
+
+static void colour_code_v3( i8 cc, v3f target );
+static int hash21i( v2i p, u32 umod );
+
+// Mesh functions
+// --------------
+static void init_mesh( struct mesh *m, float const *tris, u32 length );
+static void free_mesh( struct mesh *m );
+static void use_mesh( struct mesh *m );
+static void draw_mesh( int const start, int const count );
+
+// World buttons
+// -------------
+static void level_selection_buttons(void);
+
+// Map/world interface
+// -------------------
+static void map_free(void);
+static void io_reset(void);
+static struct cell *pcell( v2i pos );
+static void lcell( int id, v2i pos );
+static void map_reclassify( v2i start, v2i end, int update_texbuffer );
+static void gen_level_text(void);
+static int map_load( const char *str, const char *name );
+static void map_serialize( FILE *stream );
+
+// Career
+// ------
+static void career_serialize(void);
+static void career_unlock_level( struct cmp_level *lvl );
+static void career_unlock_level( struct cmp_level *lvl );
+static void career_pass_level( struct cmp_level *lvl, int score, int upload );
+static void career_reset_level( struct cmp_level *lvl );
+static void career_load(void);
+static void clear_animation_flags(void);
+
+// Gameplay main
+// -------------
+static void simulation_stop(void);
+static void simulation_start(void);
+static int world_check_pos_ok( v2i co, int dist );
+static int cell_interactive( v2i co );
+
+void vg_update(void);
+static void render_tiles( v4f const regular_colour, v4f const selected_colour );
+static void render_tile_block( v2i start, v2i end, v4f const regular_colour, v4f const selected_colour );
+
+void vg_render(void);
+void vg_ui(void);
+
+// Leaderboard stuff
+// -----------------
+#ifdef STEAM_LEADERBOARDS
+void leaderboard_set_score( struct cmp_level *cmp_level, u32 score );
+void leaderboard_dispatch_score(void);
+void leaderboard_found( LeaderboardFindResult_t *pCallback );
+void leaderboard_downloaded( LeaderboardScoresDownloaded_t *pCallback );
+void leaderboard_set_score( struct cmp_level *cmp_level, u32 score );
+#endif
+
+// Console commands
+// ----------------
 static int console_credits( int argc, char const *argv[] );
 static int console_save_map( int argc, char const *argv[] );
 static int console_load_map( int argc, char const *argv[] );
 static int console_changelevel( int argc, char const *argv[] );
 
+void vg_start(void);
+void vg_free(void);
+
+int main( int argc, char *argv[] );
+
 // GLOBALS
 // ===========================================================================================================
 
@@ -239,31 +369,66 @@ m3x3f m_projection;
 m3x3f m_view;
 m3x3f m_mdl;
 
-struct world world;
-
 // UTILITY
 // ===========================================================================================================
 
-static void colour_code_v3( char const cc, v3f target )
+static int colour_set_id = 0;
+static int world_theme_id = 0;
+
+static v3f colour_sets[][4] =
 {
-       static v3f colour_sets[] =
-       { { 1.0f, 0.9f, 0.3f },
-         { 0.2f, 0.9f, 0.14f },
-         { 0.4f, 0.8f, 1.00f },
-         { 0.882f, 0.204f, 0.922f }
-       };
+       { { 1.0f, 0.9f, 0.3f },                 // Yellow
+         { 0.4f, 0.8f, 1.00f },                // Blue
+         { 0.2f, 0.9f, 0.14f },                // Green
+         { 0.882f, 0.204f, 0.922f }    // Pink
+       },
+       { { 1.0f, 0.9f, 0.3f },                 // Yellow
+         { 0.4f, 0.8f, 1.00f },                // Blue
+         { 0.85f, 0.85f, 0.85f },              // Weiss
+         { 0.2f, 0.2f, 0.2f }                  // Black/Gray
+       },
+       { { 1.0f, 0.9f, 0.3f },                 // Yellow
+         { 0.827f, 0.373f, 0.718f },   // Pink
+         { 0.0f, 0.353f, 0.71f },              // Blue
+         { 0.863f, 0.196f, 0.125f }    // Red
+       },
+};
 
-       if( cc >= 'a' && cc <= 'z' )
-       {
-               int id = cc - 'a';
-               
-               if( id < vg_list_size( colour_sets ) )
-               {
-                       v3_copy( colour_sets[ id ], target );
-                       return;
-               }
-       }
+static struct world_theme
+{
+   const char *name;
+   v3f col_shadow;
+
+   vg_tex2d *tex_tiles;
+}
+world_themes[] =
+{
+   {
+      "Minimal",
+      { 0.8f, 0.8f, 0.8f },
+      &tex_tiles_min
+   },
+   {
+      "Wood",
+      { 0.89f, 0.8f, 0.7f },
+      &tex_tiles_wood
+   },
+   {
+      "Lab",
+      { 0.7f, 0.7f, 0.7f },
+      &tex_tiles_lab
+   }
+};
+
+static void colour_code_v3( i8 cc, v3f target )
+{
+   if( (cc >= 0) && (cc < vg_list_size( colour_sets[0] )) )
+   {
+      v3_copy( colour_sets[colour_set_id][ cc ], target );
+      return;
+   }
        
+   vg_error( "Invalid colour code used '%d'\n", (int)cc );
        v3_copy( (v3f){0.0f,0.0f,0.0f}, target );
 }
 
@@ -343,15 +508,6 @@ static void use_mesh( struct mesh *m )
        glBindVertexArray( m->vao );
 }
 
-
-
-
-
-static struct cell_button *get_wbutton( enum e_world_button btn )
-{
-       return &world.buttons[ btn ];
-}
-
 void leaderboard_set_score( struct cmp_level *cmp_level, u32 score );
 
 // WORLD/MAP
@@ -361,7 +517,10 @@ static void map_free(void)
 {      
        arrfree( world.data );
        arrfree( world.io );
-       
+
+       free( world.cmd_buf_tiles );
+       world.cmd_buf_tiles = NULL;
+
        world.w = 0;
        world.h = 0;
        world.data = NULL;
@@ -389,6 +548,12 @@ static struct cell *pcell( v2i pos )
        return &world.data[ pos[1]*world.w + pos[0] ];
 }
 
+static void lcell( int id, v2i pos )
+{
+       pos[0] = id % world.w;
+       pos[1] = (id - pos[0]) / world.w;
+}
+
 static void map_reclassify( v2i start, v2i end, int update_texbuffer )
 {
        v2i full_start = { 1,1 };
@@ -420,12 +585,12 @@ static void map_reclassify( v2i start, v2i end, int update_texbuffer )
                        u8 height = 0;
                        u8 config = 0x00;
                        
-                       if( cell->state & (FLAG_CANAL|FLAG_INPUT|FLAG_OUTPUT) )
+                       if( cell->state & (FLAG_CANAL|FLAG_INPUT|FLAG_OUTPUT|FLAG_EMITTER) )
                        {
                                for( int i = 0; i < vg_list_size( dirs ); i ++ )
                                {
                                        struct cell *neighbour = pcell((v2i){x+dirs[i][0], y+dirs[i][1]});
-                                       if( neighbour->state & (FLAG_CANAL|FLAG_INPUT|FLAG_OUTPUT) )
+                                       if( neighbour->state & (FLAG_CANAL|FLAG_INPUT|FLAG_OUTPUT|FLAG_EMITTER) )
                                                config |= 0x1 << i;
                                }
                                
@@ -436,7 +601,7 @@ static void map_reclassify( v2i start, v2i end, int update_texbuffer )
                                if( cell->state & FLAG_WALL )
                                        height = 0xFF-0x3F + hash21i( (v2i){x,y}, 0x3F );
                                
-                               config = 0xF;
+                               config = cell->state & FLAG_INPUT_NICE? 0xB: 0xF;
                        }
                        
                        pcell((v2i){x,y})->config = config;
@@ -450,7 +615,7 @@ static void map_reclassify( v2i start, v2i end, int update_texbuffer )
                        if( 
                                (
                                        ((cell->state & FLAG_IS_TRIGGER) && (cell->config == 0xF || cell->config == k_cell_type_split)) || 
-                                       ((cell->state & FLAG_TARGETED) && (cell->config != k_cell_type_split)) 
+                                       ((cell->state & FLAG_TARGETED) && ((cell->config != k_cell_type_split) && !(cell->state & FLAG_EMITTER))) 
                                ) && update_texbuffer
                        ){
                                cell->state &= ~(FLAG_TARGETED|FLAG_IS_TRIGGER);
@@ -480,10 +645,72 @@ static void map_reclassify( v2i start, v2i end, int update_texbuffer )
        }
 }
 
+static void gen_level_text(void)
+{
+   // Old style UI.
+   ui_px const unit_scale_px = 4*UI_GLYPH_SPACING_X; // 4 char per unit
+   ui_begin( &world.st.world_text, world.w*unit_scale_px, world.h*unit_scale_px );
+   
+   if( world.pCmpLevel )
+   {
+      for( int i = 0; i < vg_list_size( world.pCmpLevel->strings ); i ++ )
+      {
+         struct world_string *wstr = &world.pCmpLevel->strings[i];
+
+         if( wstr->str )
+         {
+            ui_px pos[2];
+
+            pos[0] = -UI_GLYPH_SPACING_X/2;
+
+            if( wstr->placement == k_placement_bottom )
+               pos[1] = 2*-unit_scale_px;
+            else
+               pos[1] = (world.h-1)*-unit_scale_px -6;
+
+            ui_text( &world.st.world_text, pos, wstr->str, 1, k_text_align_left );
+         }
+      }
+   }
+
+   // re-create level scores
+   for( int i = 0; i < vg_list_size( career_packs ); i ++ )
+   {
+      struct career_level_pack *set = &career_packs[i];
+
+      ui_text( &world.st.world_text,
+         (ui_px [2]){
+             set->origin[0]*unit_scale_px,
+            -(set->origin[1]+set->dims[1]+1)*unit_scale_px + 18
+         },
+         set->title, 1, k_text_align_left );
+
+      for( int j = 0; j < set->count; j ++ )
+      {
+         struct cmp_level *lvl = &set->pack[j];
+
+         if( lvl->completed_score && !lvl->is_tutorial )
+         {
+            char num[10];
+            snprintf( num, 9, "%d", lvl->completed_score );
+
+            ui_text( &world.st.world_text, 
+               (ui_px [2]){ 
+                   lvl->btn.position[0]*unit_scale_px + unit_scale_px/2,
+                  -lvl->btn.position[1]*unit_scale_px - unit_scale_px/2 
+               },
+               num, 1, k_text_align_center );
+         }
+      }
+   }
+
+   //ui_text( &world.st.world_text, (ui_px [2]){ 0, 0 }, "Preview", 1, k_text_align_left );
+
+   ui_resolve( &world.st.world_text );
+}
+
 static int map_load( const char *str, const char *name )
 {
-       //TODO: It may be worthwhile, at this point, to switch to binary encoding for save data
-       
        map_free();
 
        char const *c = str;
@@ -536,8 +763,12 @@ static int map_load( const char *str, const char *name )
                                                struct terminal_run *run = &terminal->runs[ terminal->run_count-1 ];
 
                                                if( (*c >= 'a' && *c <= 'z') || *c == ' ' )
-                                               {                                                       
-                                                       run->conditions[ run->condition_count ++ ] = *c;
+                                               {
+                     i8 code = -1;
+                     if( *c != ' ' )
+                        code = *c - 'a';
+
+                                                       run->steps[ run->step_count ++ ] = code;
                                                }
                                                else
                                                {
@@ -550,7 +781,7 @@ static int map_load( const char *str, const char *name )
                                                        }
                                                        else if( *c == ':' )
                                                        {
-                                                               terminal->runs[ terminal->run_count ].condition_count = 0;
+                                                               terminal->runs[ terminal->run_count ].step_count = 0;
                                                                terminal->run_count ++;
                                                                world.max_runs = vg_max( world.max_runs, terminal->run_count );
                                                        }
@@ -646,18 +877,28 @@ static int map_load( const char *str, const char *name )
                        struct cell *cell = &row[ cx ];
                        cell->config = 0xF;
                        
-                       if( *c == '+' || *c == '-' )
+                       cell->links[0] = 0;
+                       cell->links[1] = 0;
+
+                       if( *c == '+' || *c == '-' || *c == '*' )
                        {
                                struct cell_terminal *term = arraddnptr( world.io, 1 );
                                term->pos[0] = cx;
                                term->pos[1] = world.h;
                                
                                term->run_count = 1;
-                               term->runs[0].condition_count = 0;
+                               term->runs[0].step_count = 0;
+                               
+                               switch( *c )
+                               {
+                                       case '+': cell->state = FLAG_INPUT; break;
+                                       case '-': cell->state = FLAG_OUTPUT; break;
+                                       case '*': cell->state = FLAG_EMITTER; break;
+                               }
 
-                               cell->state = *c == '+'? FLAG_INPUT: FLAG_OUTPUT;
                                reg_end ++;
                        }
+         else if( *c == '.' ) cell->state = FLAG_INPUT_NICE;
                        else if( *c == '#' ) cell->state = FLAG_WALL;
                        else if( ((u32)*c >= (u32)'A') && ((u32)*c <= (u32)'A'+0xf) )
                        {
@@ -672,8 +913,6 @@ static int map_load( const char *str, const char *name )
                                if( cell->state & FLAG_IS_TRIGGER )
                                        arrpush( links_to_make, cx + world.h*world.w );
                                
-                               cell->links[0] = 0;
-                               cell->links[1] = 0;
                                world.score ++; 
                        }
                        else cell->state = 0x00;
@@ -683,6 +922,27 @@ static int map_load( const char *str, const char *name )
        
                c ++;
        }
+
+       // Assign emitter codes
+       for( int i = 0; i < arrlen( world.io ); i ++ )
+       {
+               struct cell_terminal *term = &world.io[i];
+               struct cell *cell = pcell( term->pos );
+
+               if( cell->state & FLAG_EMITTER )
+               {
+         if( (term->run_count > 0) && (term->runs[0].step_count >= 2) )
+         {
+            cell->emit[0] = term->runs[0].steps[0];
+            cell->emit[1] = term->runs[0].steps[1];
+         }
+         else
+         {
+            vg_error( "Emitter was not assigned emit values\n" );
+            goto IL_REG_ERROR;
+         }
+               }
+       }
                
        // Update data texture to fill out the background
        {
@@ -693,12 +953,46 @@ static int map_load( const char *str, const char *name )
                        {
                                u8 *px = &info_buffer[((x*64)+y)*4];
                                
-                               px[0] = 0xFF-0x3F + hash21i( (v2i){x,y}, 0x3F );
+                               // Fade out edges of world so that there isnt an obvious line
+                               int dist_x = 16 - VG_MIN( VG_MIN( x, 16 ), 16-VG_MAX( x-16-world.w, 0 ) );
+                               int dist_y = 16 - VG_MIN( VG_MIN( y, 16 ), 16-VG_MAX( y-16-world.h, 0 ) );
+                               int dist = VG_MAX( dist_x, dist_y ) * 16;
+
+                               int value = VG_MAX( 0, 0xFF-0x3F + hash21i( (v2i){x,y}, 0x3F ) - dist );
+                               
+                               px[0] = value;
                                px[1] = 0;
                                px[2] = 0;
                                px[3] = 0;
                        }
                }
+               
+               // Level selection area
+               
+               for( int i = 0; i < vg_list_size( career_packs ); i ++ )
+               {
+                       struct career_level_pack *grid = &career_packs[ i ];
+               
+                       int j = 0;
+
+                       for( int y = 0; y < grid->dims[1]; y ++ )
+                       {
+                               for( int x = 0; x < grid->dims[0]; x ++ )
+                               {
+                                       u8 *px = &info_buffer[((y+16+grid->origin[1])*64+16+x+grid->origin[0])*4];
+                                       px[0] = 0x10;
+
+                                       if( j < grid->count )
+                                       {
+                                               struct cmp_level *lvl = &grid->pack[ j ++ ];
+                                               v2i_add( grid->origin, (v2i){x,y}, lvl->btn.position );
+                                       }
+                               }
+                       }
+               }
+               
+               info_buffer[(((16+world.h-3)*64)+world.w+16-1)*4] = 0x30;
+               info_buffer[(((16+world.h-2)*64)+world.w+16-1)*4] = 0x30;
 
                // Random walks.. kinda
                for( int i = 0; i < arrlen(world.io); i ++ )
@@ -708,12 +1002,16 @@ static int map_load( const char *str, const char *name )
                        v2i turtle;
                        v2i turtle_dir;
                        int original_y;
+
+                       // Only make breakouts for terminals on the edge
+                       if( !(term->pos[1] == 1 || term->pos[1] == world.h-2) )
+                               continue;
                        
                        turtle[0] = 16+term->pos[0];
                        turtle[1] = 16+term->pos[1];
                        
                        turtle_dir[0] = 0;
-                       turtle_dir[1] = pcell(term->pos)->state & FLAG_INPUT? 1: -1;
+                       turtle_dir[1] = pcell(term->pos)->state & (FLAG_INPUT|FLAG_EMITTER)? 1: -1;
                        original_y = turtle_dir[1];
                        
                        info_buffer[((turtle[1]*64)+turtle[0])*4] = 0;  
@@ -767,7 +1065,8 @@ static int map_load( const char *str, const char *name )
                        if( src->links[link_id] <= world.h*world.w )
                        {               
                                struct cell *target = &world.data[ src->links[link_id] ];
-                               if( (target->state & FLAG_CANAL) && (target->config == k_cell_type_split) )
+                               if( ((target->state & FLAG_CANAL) && (target->config == k_cell_type_split))
+                                       || (target->state & FLAG_EMITTER) )
                                {
                                        if( target->links[ link_id ] )
                                        {
@@ -795,12 +1094,28 @@ static int map_load( const char *str, const char *name )
                }
        }
        
+   // ==========================================================
+   // Successful load
+
        vg_success( "Map '%s' loaded! (%u:%u)\n", name, world.w, world.h );
        
        io_reset();
        
        strncpy( world.map_name, name, vg_list_size( world.map_name )-1 );
        world.initialzed = 1;
+
+       // Setup world button locations
+       for( int i = 0; i < vg_list_size( world.st.buttons ); i ++ )
+       {
+               struct world_button *btn = &world.st.buttons[i];
+               btn->position[0] = world.w -1;
+               btn->position[1] = world.h -i -2;
+       }
+
+       // Allocate buffers for render commands
+       world.cmd_buf_tiles = malloc( world.w*world.h* sizeof( struct render_cmd ) );
+       world.max_commands = world.w*world.h;
+       
        return 1;
        
 IL_REG_ERROR:
@@ -818,8 +1133,10 @@ static void map_serialize( FILE *stream )
                        struct cell *cell = pcell( (v2i){ x, y } );
                        
                        if( cell->state & FLAG_WALL ) fputc( '#', stream );
+         else if( cell->state & FLAG_INPUT_NICE ) fputc( '.', stream );
                        else if( cell->state & FLAG_INPUT ) fputc( '+', stream );
                        else if( cell->state & FLAG_OUTPUT ) fputc( '-', stream );
+                       else if( cell->state & FLAG_EMITTER ) fputc( '*', stream );
                        else if( cell->state & (FLAG_CANAL|FLAG_IS_TRIGGER|FLAG_RESERVED0|FLAG_RESERVED1) ) 
                        {
                                fputc( (cell->state & (FLAG_CANAL|FLAG_IS_TRIGGER|FLAG_RESERVED0|FLAG_RESERVED1)) + (u32)'A', stream );
@@ -846,8 +1163,11 @@ static void map_serialize( FILE *stream )
                                        {
                                                struct terminal_run *run = &term->runs[j];
                                                
-                                               for( int k = 0; k < run->condition_count; k ++ )
-                                                       fputc( run->conditions[k], stream );
+                                               for( int k = 0; k < run->step_count; k ++ )
+                  {
+                     i8 step = run->steps[k];
+                                                       fputc( step == -1? ' ': ('a' + run->steps[k]), stream );
+                  }
                                                        
                                                if( j < term->run_count-1 )
                                                        fputc( ':', stream );
@@ -887,6 +1207,7 @@ struct dcareer_state
        struct dlevel_state
        {
                i32 score;
+
                i32 unlocked;
                i32 reserved[2];
        }
@@ -902,14 +1223,14 @@ static void career_serialize(void)
                return;
 
        struct dcareer_state encoded;
-       encoded.version = 2;
+       encoded.version = MARBLE_COMP_VERSION;
        encoded.in_map = world.pCmpLevel? world.pCmpLevel->serial_id: -1;
        
        memset( encoded.reserved, 0, sizeof( encoded.reserved ) );
 
-       for( int i = 0; i < vg_list_size( career_serializable ); i ++ )
+       for( int i = 0; i < vg_list_size( career_packs ); i ++ )
        {
-               struct serializable_set *set = &career_serializable[i];
+               struct career_level_pack *set = &career_packs[i];
                
                for( int j = 0; j < set->count; j ++ )
                {
@@ -919,7 +1240,7 @@ static void career_serialize(void)
                        dest->score = lvl->completed_score;
                        dest->unlocked = lvl->unlocked;
                        dest->reserved[0] = 0;
-                       dest->reserved[1] = 0;
+         dest->reserved[1] = 0;
                }
        }
 
@@ -938,16 +1259,29 @@ static void career_unlock_level( struct cmp_level *lvl )
 static void career_pass_level( struct cmp_level *lvl, int score, int upload )
 {
        if( score > 0 )
-       {
-               if( score < lvl->completed_score || lvl->completed_score == 0 )
+   {
+      lvl->completed_score = score;
+      gen_level_text();
+               
+               if( lvl->unlock ) 
+         career_unlock_level( lvl->unlock );
+               
+               if( lvl->achievement )
+                       sw_set_achievement( lvl->achievement );
+
+               // Check ALL maps to trigger master engineer
+               for( int i = 0; i < vg_list_size( career_packs ); i ++ )
                {
-                       if( !lvl->is_tutorial && upload )
-                               leaderboard_set_score( lvl, score );
+                       struct career_level_pack *set = &career_packs[i];
                        
-                       lvl->completed_score = score;
+                       for( int j = 0; j < set->count; j ++ )
+                       {
+                               if( set->pack[j].completed_score == 0 )
+                                       return;
+                       }
                }
                
-               if( lvl->unlock ) career_unlock_level( lvl->unlock );
+               sw_set_achievement( "MASTER_ENGINEER" );
        }
 }
 
@@ -964,7 +1298,7 @@ static void career_load(void)
 
        // Blank save state
        memset( (void*)&encoded, 0, sizeof( struct dcareer_state ) );   
-       encoded.in_map = -1;
+       encoded.in_map = 0;
        encoded.levels[0].unlocked = 1;
        
        // Load and copy data into encoded
@@ -988,9 +1322,9 @@ static void career_load(void)
                vg_info( "No save file... Using blank one\n" );
        
        // Reset memory
-       for( int i = 0; i < vg_list_size( career_serializable ); i ++ )
+       for( int i = 0; i < vg_list_size( career_packs ); i ++ )
        {
-               struct serializable_set *set = &career_serializable[i];
+               struct career_level_pack *set = &career_packs[i];
                
                for( int j = 0; j < set->count; j ++ )
                        career_reset_level( &set->pack[j] );
@@ -999,10 +1333,12 @@ static void career_load(void)
        // Header information
        // =================================
        
+       struct cmp_level *lvl_to_load = &career_packs[0].pack[0];
+
        // Decode everything from dstate
-       for( int i = 0; i < vg_list_size( career_serializable ); i ++ )
+       for( int i = 0; i < vg_list_size( career_packs ); i ++ )
        {
-               struct serializable_set *set = &career_serializable[i];
+               struct career_level_pack *set = &career_packs[i];
                
                for( int j = 0; j < set->count; j ++ )
                {
@@ -1010,25 +1346,37 @@ static void career_load(void)
                        struct dlevel_state *src = &encoded.levels[lvl->serial_id];
                        
                        if( src->unlocked ) career_unlock_level( lvl );
-                       if( src->score ) lvl->completed_score = src->score;
+                       if( src->score )
+         {
+            lvl->completed_score = src->score;
+
+            // Apply unlocking to next levels in case there was an update
+            if( lvl->unlock )
+               career_unlock_level( lvl->unlock );
+         }
                        
-                       // ...
                        if( lvl->serial_id == encoded.in_map )
-                       {
-                               if( console_changelevel( 1, &lvl->map_name ) )
-                                       world.pCmpLevel = lvl;
-                       }
+                               lvl_to_load = lvl;
                }
        }
        
+       if( console_changelevel( 1, &lvl_to_load->map_name ) )
+       {
+               world.pCmpLevel = lvl_to_load;
+               gen_level_text();
+       }
+
        career_load_success = 1;
+
+   if( encoded.version < MARBLE_COMP_VERSION || 1 )
+      world.st.state = k_game_state_update;
 }
 
 // MAIN GAMEPLAY
 // ===========================================================================================================
 static int is_simulation_running(void)
 {
-       return world.buttons[ k_world_button_sim ].pressed;
+       return world.st.buttons[ k_world_button_sim ].state;
 }
 
 static void clear_animation_flags(void)
@@ -1039,8 +1387,8 @@ static void clear_animation_flags(void)
 
 static void simulation_stop(void)
 {
-       world.buttons[ k_world_button_sim ].pressed = 0;
-       world.buttons[ k_world_button_pause ].pressed = 0;
+       world.st.buttons[ k_world_button_sim ].state = 0;
+       world.st.buttons[ k_world_button_pause ].state = 0;
        
        world.num_fishes = 0;
        world.sim_frame = 0;
@@ -1066,7 +1414,7 @@ static void simulation_start(void)
        world.sim_frame = 0;
        world.sim_run = 0;
        
-       world.sim_delta_speed = 2.5f;
+       world.sim_delta_speed = world.st.buttons[ k_world_button_speedy ].state? 10.0f: 2.5f;
        world.sim_delta_ref = vg_time;
        world.sim_internal_ref = 0.0f;
        world.sim_internal_time = 0.0f;
@@ -1077,21 +1425,36 @@ static void simulation_start(void)
        clear_animation_flags();
        
        io_reset();
+       
+       if( world.pCmpLevel )
+       {
+               world.pCmpLevel->completed_score = 0;
+      gen_level_text();
+       }
 }
 
-static int world_check_pos_ok( v2i co )
+static int world_check_pos_ok( v2i co, int dist )
 {
-       return (co[0] < 2 || co[0] >= world.w-2 || co[1] < 2 || co[1] >= world.h-2)? 0: 1;
+       return (co[0] < dist || co[0] >= world.w-dist || co[1] < dist || co[1] >= world.h-dist)? 0: 1;
 }
 
 static int cell_interactive( v2i co )
 {
+       struct cell *cell;
+
        // Bounds check
-       if( !world_check_pos_ok( co ) )
+       if( world_check_pos_ok( co, 1 ) )
+       {
+               cell = pcell( co );
+               if( cell->state & FLAG_EMITTER )
+                       return 1;
+       }
+
+       if( !world_check_pos_ok( co, 2 ) )
                return 0;
 
        // Flags check
-       if( world.data[ world.w*co[1] + co[0] ].state & (FLAG_WALL|FLAG_INPUT|FLAG_OUTPUT) )
+       if( cell->state & (FLAG_WALL|FLAG_INPUT|FLAG_OUTPUT) )
                return 0;
 
        // List of 3x3 configurations that we do not allow
@@ -1148,7 +1511,7 @@ static int cell_interactive( v2i co )
                {                
                        struct cell *cell = pcell((v2i){x,y});
 
-                       if( cell && (cell->state & (FLAG_CANAL|FLAG_INPUT|FLAG_OUTPUT)) )
+                       if( cell && (cell->state & (FLAG_CANAL|FLAG_INPUT|FLAG_OUTPUT|FLAG_EMITTER)) )
                                blob |= 0x1 << ((y-(co[1]-2))*5 + x-(co[0]-2));
                }
 
@@ -1169,8 +1532,29 @@ static int cell_interactive( v2i co )
        return 1;
 }
 
-void vg_update(void)
+static void vg_update(void)
 {
+       // Async events
+       if( world.st.lvl_to_load )
+       {
+               world.st.world_transition = (world.st.lvl_load_time-vg_time) * 4.0f;
+
+               if( vg_time > world.st.lvl_load_time )
+               {       
+                       if( console_changelevel( 1, &world.st.lvl_to_load->map_name ) )
+                       {
+                               world.pCmpLevel = world.st.lvl_to_load;
+                               gen_level_text();
+                       }
+
+                       world.st.lvl_to_load = NULL;
+               }
+       }
+       else
+       {
+               world.st.world_transition = vg_minf( 1.0f, (vg_time-world.st.lvl_load_time) * 4.0f );
+       }
+
        // Camera
        // ========================================================================================================
        
@@ -1178,18 +1562,39 @@ void vg_update(void)
                        r2 = (float)world.h / (float)world.w,
                        size;
        
-       size = ( r2 < r1? (float)world.w * 0.5f: ((float)world.h * 0.5f) / r1 ) + 2.5f; 
-       m3x3_projection( m_projection, -size, size, -size*r1, size*r1 );
+       static float size_current = 2.0f;
+       static v3f origin_current = { 0.0f, 0.0f, 0.0f };
+       static v2f drag_offset = { 0.0f, 0.0f };
+       static v2f view_point = { 0.0f, 0.0f };
+       v2f result_view;
+
+       size = ( r2 < r1? (float)(world.w+5) * 0.5f: ((float)(world.h+5) * 0.5f) / r1 ) + 0.5f;
        
-       v3f origin;
-       origin[0] = floorf( -0.5f * world.w );
+       v2f origin;
+       v2f vt_target;
+
+       origin[0] = floorf( -0.5f * ((float)world.w-4.5f) );
        origin[1] = floorf( -0.5f * world.h );
-       origin[2] = 0.0f;
        
+       // Create and clamp result view
+       v2_add( view_point, drag_offset, result_view );
+       result_view[0] = vg_clampf( result_view[0], -world.st.zoom, world.st.zoom );
+       result_view[1] = vg_clampf( result_view[1], -world.st.zoom*r1, world.st.zoom*r1 );
+       
+       v2_add( origin, result_view, vt_target );
+
+       // Lerp towards target
+       size_current = vg_lerpf( size_current, size - world.st.zoom, vg_time_delta * 6.0f );
+       v2_lerp( origin_current, vt_target, vg_time_delta * 6.0f, origin_current ); 
+       
+       m3x3_projection( m_projection, -size_current, size_current, -size_current*r1, size_current*r1 );
        m3x3_identity( m_view );
-       m3x3_translate( m_view, origin );
+       m3x3_translate( m_view, origin_current );
        m3x3_mul( m_projection, m_view, vg_pv );
        vg_projection_update();
+
+   if( world.st.state == k_game_state_update )
+      return;
        
        // Mouse input
        // ========================================================================================================
@@ -1198,6 +1603,50 @@ void vg_update(void)
        world.tile_x = floorf( world.tile_pos[0] );
        world.tile_y = floorf( world.tile_pos[1] );
 
+       // Camera dragging
+       {
+               static v2f drag_origin; // x/y pixel
+
+               if( vg_get_button_down( "tertiary" ) )
+                       v2_copy( vg_mouse, drag_origin );
+               else if( vg_get_button( "tertiary" ) )
+               {
+                       // get offset
+                       v2_sub( vg_mouse, drag_origin, drag_offset );
+                       v2_div( drag_offset, (v2f){ vg_window_x, vg_window_y }, drag_offset );
+                       v2_mul( drag_offset, (v2f){ size_current*2.0f, -size_current*r1*2.0f }, drag_offset );
+               }
+               else
+               {
+                       v2_copy( result_view, view_point );
+                       v2_copy( (v2f){0.0f,0.0f}, drag_offset );
+               }
+       }
+
+       // Zooming
+       {
+               v2f mview_local;
+               v2f mview_new;
+               v2f mview_cur;
+               v2f mview_delta;
+               float rsize;
+
+               rsize = size-world.st.zoom;
+
+               v2_div( vg_mouse, (v2f){ vg_window_x*0.5f, vg_window_y*0.5f }, mview_local );
+               v2_add( (v2f){ -rsize, -rsize*r1 }, (v2f){ mview_local[0]*rsize, (2.0f-mview_local[1])*rsize*r1 }, mview_cur );
+
+               world.st.zoom = vg_clampf( world.st.zoom + vg_mouse_wheel[1], 0.0f, size - 4.0f );
+
+               // Recalculate new position
+               rsize = size-world.st.zoom;
+               v2_add( (v2f){ -rsize, -rsize*r1 }, (v2f){ mview_local[0]*rsize, (2.0f-mview_local[1])*rsize*r1 }, mview_new );
+
+               // Apply offset
+               v2_sub( mview_new, mview_cur, mview_delta );
+               v2_add( mview_delta, view_point, view_point );
+       }
+       
        // Tilemap
        // ========================================================================================================
        if( !is_simulation_running() && !gui_want_mouse() )
@@ -1209,48 +1658,50 @@ void vg_update(void)
                        world.selected = world.tile_y * world.w + world.tile_x;
                        
                        static u32 modify_state = 0;
-                       
                        struct cell *cell_ptr = &world.data[world.selected];
-                       
-                       if( vg_get_button_down("primary") )
-                               modify_state = (cell_ptr->state & FLAG_CANAL) ^ FLAG_CANAL;
-                       
-                       if( vg_get_button("primary") && ((cell_ptr->state & FLAG_CANAL) != modify_state) )
+               
+                       if( !(cell_ptr->state & FLAG_EMITTER) )
                        {
-                               cell_ptr->state &= ~FLAG_CANAL;
-                               cell_ptr->state |= modify_state;
+                               if( vg_get_button_down("primary") )
+                                       modify_state = (cell_ptr->state & FLAG_CANAL) ^ FLAG_CANAL;
                                
-                               if( cell_ptr->state & FLAG_CANAL )
+                               if( vg_get_button("primary") && ((cell_ptr->state & FLAG_CANAL) != modify_state) )
                                {
-                                       cell_ptr->links[0] = 0;
-                                       cell_ptr->links[1] = 0;
+                                       cell_ptr->state &= ~FLAG_CANAL;
+                                       cell_ptr->state |= modify_state;
                                        
-                                       sfx_set_playrnd( &audio_tile_mod, &audio_system_sfx, 3, 6 );
-                                       world.score ++;
-                               }
-                               else
-                               {                                       
-                                       sfx_set_playrnd( &audio_tile_mod, &audio_system_sfx, 0, 3 );
-                                       world.score --;
-                               }
+                                       if( cell_ptr->state & FLAG_CANAL )
+                                       {
+                                               cell_ptr->links[0] = 0;
+                                               cell_ptr->links[1] = 0;
+                                               
+                                               sfx_set_playrnd( &audio_tile_mod, &audio_system_sfx, 3, 6 );
+                                               world.score ++;
+                                       }
+                                       else
+                                       {                                       
+                                               sfx_set_playrnd( &audio_tile_mod, &audio_system_sfx, 0, 3 );
+                                               world.score --;
+                                       }
 
-                               map_reclassify(         (v2i){ world.tile_x -2, world.tile_y -2 }, 
+                                       map_reclassify((v2i){ world.tile_x -2, world.tile_y -2 }, 
                                                                                (v2i){ world.tile_x +2, world.tile_y +2 }, 1 );
-                       }
-                       
-                       if( vg_get_button_down("secondary") && (cell_ptr->state & FLAG_CANAL) && !(cell_ptr->config == k_cell_type_split) )
-                       {
-                               world.id_drag_from = world.selected;
-                       
-                               struct cell_description *desc = &cell_descriptions[ world.data[world.id_drag_from].config ];
-                               v2_add( desc->trigger_pos, (v2f){ world.tile_x, world.tile_y }, world.drag_from_co );
+                               }
+                               
+                               if( vg_get_button_down("secondary") && (cell_ptr->state & FLAG_CANAL) && !(cell_ptr->config == k_cell_type_split) )
+                               {
+                                       world.id_drag_from = world.selected;
+                               
+                                       struct cell_description *desc = &cell_descriptions[ world.data[world.id_drag_from].config ];
+                                       v2_add( desc->trigger_pos, (v2f){ world.tile_x, world.tile_y }, world.drag_from_co );
+                               }
                        }
                        
                        float local_x = vg_mouse_ws[0] - (float)world.tile_x;
                        
                        if( vg_get_button_up("secondary") && world.id_drag_from == world.selected )
                        {
-                               u32 link_id = local_x > 0.5f? 1: 0;
+                               u32 link_id = cell_ptr->links[ 0 ]? 0: 1;
                                
                                // break existing connection off
                                if( cell_ptr->links[ link_id ] )
@@ -1268,7 +1719,8 @@ void vg_update(void)
                                world.id_drag_from = 0;
                        }
                        
-                       if( world.id_drag_from && (cell_ptr->state & FLAG_CANAL) && (cell_ptr->config == k_cell_type_split) )
+                       else if( world.id_drag_from && (cell_ptr->state & (FLAG_CANAL|FLAG_EMITTER)) && 
+                               ((cell_ptr->config == k_cell_type_split) || (cell_ptr->state & FLAG_EMITTER)) )
                        {
                                world.drag_to_co[0] = (float)world.tile_x + (local_x > 0.5f? 0.75f: 0.25f);
                                world.drag_to_co[1] = (float)world.tile_y + 0.25f;
@@ -1287,17 +1739,20 @@ void vg_update(void)
                                                current_connection->state &= ~FLAG_IS_TRIGGER;
                                                current_connection->links[ link_id ] = 0;
                                        }
-                                       
-                                       if( drag_ptr->links[ link_id ^ 0x1 ] )
+                               
+                                       for( u32 i = 0; i < 2; i ++ )
                                        {
-                                               vg_warn( "Destroying alternate link %u (%hu)\n", link_id ^ 0x1, drag_ptr->links[ link_id ^ 0x1 ] );
-                                               
-                                               struct cell *current_connection = &world.data[ drag_ptr->links[ link_id ^ 0x1 ]];
-                                               if( !current_connection->links[ link_id ] )
-                                                       current_connection->state &= ~FLAG_TARGETED;
-                                               
-                                               current_connection->links[ link_id ^ 0x1 ] = 0;
-                                               drag_ptr->links[ link_id ^ 0x1 ] = 0;
+                                               if( drag_ptr->links[ i ] )
+                                               {
+                                                       vg_warn( "Destroying link %u (%hu)\n", i, drag_ptr->links[ i ] );
+                                                       
+                                                       struct cell *current_connection = &world.data[ drag_ptr->links[ i ]];
+                                                       if( current_connection->links[ i ^ 0x1 ] == 0 )
+                                                               current_connection->state &= ~FLAG_TARGETED;
+                                                       
+                                                       current_connection->links[ i ] = 0;
+                                                       drag_ptr->links[ i ] = 0;
+                                               }
                                        }
                                        
                                        // Create the new connection
@@ -1332,7 +1787,7 @@ void vg_update(void)
        {       
                float old_time = world.sim_internal_time;
        
-               if( !world.buttons[ k_world_button_pause ].pressed )
+               if( !world.st.buttons[ k_world_button_pause ].state )
                        world.sim_internal_time = world.sim_internal_ref + (vg_time-world.sim_delta_ref) * world.sim_delta_speed;
                else
                        world.sim_internal_time = vg_lerpf( world.sim_internal_time, world.sim_internal_ref + world.pause_offset_target, vg_time_delta*15.0f );
@@ -1340,6 +1795,9 @@ void vg_update(void)
                
                world.sim_target = (int)floorf(world.sim_internal_time);
                
+               int success_this_frame = 0;
+               int failure_this_frame = 0;
+               
                while( world.sim_frame < world.sim_target )
                {
                        sfx_set_playrnd( &audio_random, &audio_system_balls_switching, 0, 8 );
@@ -1352,7 +1810,7 @@ void vg_update(void)
                                {
                                        cell->state &= ~FLAG_FLIP_ROTATING;
                                }
-                               if( cell->state & FLAG_IS_TRIGGER )
+                               if( cell->state & (FLAG_IS_TRIGGER|FLAG_EMITTER) )
                                        cell->state &= ~FLAG_TRIGGERED;
                        }
                        
@@ -1387,7 +1845,16 @@ void vg_update(void)
                                                        {
                                                                struct terminal_run *run = &term->runs[ world.sim_run ];
                                                                if( run->recv_count < vg_list_size( run->recieved ) )
-                                                                       run->recieved[ run->recv_count ++ ] = fish->payload;
+                                                               {
+                                                                       if( fish->colour == run->steps[ run->recv_count ] )
+                                                                               success_this_frame = 1;
+                                                                       else
+                                                                               failure_this_frame = 1;
+                                                               
+                                                                       run->recieved[ run->recv_count ++ ] = fish->colour;
+                                                               }
+                                                               else
+                                                                       failure_this_frame = 1;
                                                                
                                                                break;
                                                        }
@@ -1468,7 +1935,7 @@ void vg_update(void)
                                                }
                                                else
                                                {
-                                                       if( world_check_pos_ok( fish->pos ) )
+                                                       if( world_check_pos_ok( fish->pos, 2 ) )
                                                                fish->state = k_fish_state_bg;
                                                        else
                                                        {
@@ -1484,7 +1951,7 @@ void vg_update(void)
                                {
                                        v2i_add( fish->pos, fish->dir, fish->pos );
                                        
-                                       if( !world_check_pos_ok( fish->pos ) )
+                                       if( !world_check_pos_ok( fish->pos, 2 ) )
                                        {
                                                fish->state = k_fish_state_dead;
                                                fish->death_time = -1000.0f;
@@ -1499,7 +1966,7 @@ void vg_update(void)
                                                                || cell_entry->config == k_cell_type_con_l || cell_entry->config == k_cell_type_con_d )
                                                        {
                                                                sw_set_achievement( "CAN_DO_THAT" );
-                                                       
+
                                                                fish->state = k_fish_state_soon_alive;
                                                                
                                                                fish->dir[0] = 0;
@@ -1528,9 +1995,12 @@ void vg_update(void)
                        {
                                struct fish *fish = &world.fishes[i];
                                
+                               // Apply movement
                                if( fish->state == k_fish_state_alive )
-                               {
                                        v2i_add( fish->pos, fish->dir, fish->pos );
+
+                               if( fish->state == k_fish_state_alive || fish->state == k_fish_state_soon_alive )
+                               {
                                        struct cell *cell_current = pcell( fish->pos );
 
                                        if( cell_current->state & FLAG_IS_TRIGGER )
@@ -1539,12 +2009,39 @@ void vg_update(void)
                                                
                                                struct cell *target_peice = &world.data[ cell_current->links[trigger_id] ];
                                                
-                                               cell_current->state |= FLAG_TRIGGERED;
-                                               
-                                               if( trigger_id )
-                                                       target_peice->state |= FLAG_FLIP_FLOP;
+                                               // Spawn new marble
+                                               if( (target_peice->state & FLAG_EMITTER) && !(target_peice->state & FLAG_TRIGGERED))
+                                               {
+                     if( world.num_fishes < vg_list_size( world.fishes ) )
+                     {
+                        struct fish *fish = &world.fishes[ world.num_fishes ];
+                        lcell( cell_current->links[trigger_id], fish->pos );
+
+                        fish->state = k_fish_state_soon_alive;
+                        fish->colour = target_peice->emit[ trigger_id ];
+                        
+                        if( target_peice->config != k_cell_type_stub )
+                        {
+                           struct cell_description *desc = &cell_descriptions[ target_peice->config ];
+                           v2i_copy( desc->start, fish->dir );
+                           fish->flow_reversed = 1;
+
+                           world.num_fishes ++;
+                           alive_count ++;
+                        }
+                     }
+                     else
+                        vg_warn( "Max marbles exceeded\n" );
+                                               }
                                                else
-                                                       target_peice->state &= ~FLAG_FLIP_FLOP;
+                                               {
+                                                       if( trigger_id )
+                                                               target_peice->state |= FLAG_FLIP_FLOP;
+                                                       else
+                                                               target_peice->state &= ~FLAG_FLIP_FLOP;
+                                               }
+
+                                               cell_current->state |= FLAG_TRIGGERED;
                                        }
                                }
                        }
@@ -1564,7 +2061,7 @@ void vg_update(void)
                                        {
                                                fj = &world.fishes[j];
                                                
-                                               if( (fj->state == k_fish_state_alive) )
+                                               if( fj->state == k_fish_state_alive )
                                                {
                                                        v2i fi_prev;
                                                        v2i fj_prev;
@@ -1586,7 +2083,7 @@ void vg_update(void)
                                                        if( collide_next_frame || collide_this_frame )
                                                        {
                                                                sw_set_achievement( "BANG" );
-                                                       
+
                                                                // Shatter death (+0.5s)
                                                                float death_time = world.sim_internal_time + ( collide_this_frame? 0.0f: 0.5f );
                                                                
@@ -1613,29 +2110,34 @@ void vg_update(void)
                                
                                if( is_input )
                                {
-                                       if( world.sim_frame < term->runs[ world.sim_run ].condition_count )
+                                       if( world.sim_frame < term->runs[ world.sim_run ].step_count )
                                        {
-                                               char emit = term->runs[ world.sim_run ].conditions[ world.sim_frame ];
-                                               if( emit == ' ' )
+                                               i8 emit = term->runs[ world.sim_run ].steps[ world.sim_frame ];
+                                               if( emit == -1 )
                                                        continue;
                                        
                                                struct fish *fish = &world.fishes[ world.num_fishes ];
                                                v2i_copy( term->pos, fish->pos );
                                                
                                                fish->state = k_fish_state_alive;
-                                               fish->payload = emit;
+                                               fish->colour = emit;
                                                
                                                struct cell *cell_ptr = pcell( fish->pos );
                                                
                                                if( cell_ptr->config != k_cell_type_stub )
-                                               {
-                                                       struct cell_description *desc = &cell_descriptions[ cell_ptr->config ];
-                                                       
-                                                       v2i_copy( desc->start, fish->dir );
-                                                       fish->flow_reversed = 1;
-                                                       
-                                                       world.num_fishes ++;
-                                                       alive_count ++;
+                  {
+                     if( world.num_fishes < vg_list_size(world.fishes))
+                     {
+                        struct cell_description *desc = &cell_descriptions[ cell_ptr->config ];
+                        
+                        v2i_copy( desc->start, fish->dir );
+                        fish->flow_reversed = 1;
+                        
+                        world.num_fishes ++;
+                        alive_count ++;
+                     }
+                     else
+                        vg_warn( "Max marbles exceeded\n" );
                                                }
                                        }
                                }
@@ -1648,17 +2150,16 @@ void vg_update(void)
                                for( int i = 0; i < arrlen( world.io ); i ++ )
                                {
                                        struct cell_terminal *term = &world.io[ i ];
-                                       int is_input = pcell(term->pos)->state & FLAG_INPUT;
                                        
-                                       if( !is_input )
+                                       if( pcell(term->pos)->state & FLAG_OUTPUT )
                                        {
                                                struct terminal_run *run = &term->runs[ world.sim_run ];
                                        
-                                               if( run->recv_count == run->condition_count )
+                                               if( run->recv_count == run->step_count )
                                                {
-                                                       for( int j = 0; j < run->condition_count; j ++ )
+                                                       for( int j = 0; j < run->step_count; j ++ )
                                                        {
-                                                               if( run->recieved[j] != run->conditions[j] )
+                                                               if( run->recieved[j] != run->steps[j] )
                                                                {
                                                                        world.completed = 0;
                                                                        break;
@@ -1687,7 +2188,7 @@ void vg_update(void)
                                                world.sim_delta_ref = vg_time;
                                                world.sim_internal_ref = 0.0f;
                                                
-                                               if( world.buttons[ k_world_button_pause ].pressed )
+                                               if( world.st.buttons[ k_world_button_pause ].state )
                                                        world.pause_offset_target = 0.5f;
                                                else
                                                        world.pause_offset_target = 0.0f;
@@ -1716,13 +2217,17 @@ void vg_update(void)
                                                {
                                                        career_pass_level( world.pCmpLevel, world.score, 1 );
                                                }
+                                               
+                                               sfx_set_play( &audio_tones, &audio_system_balls_extra, 9 );
+                                               failure_this_frame = 0;
+                                               success_this_frame = 0;
                                        }
                                }
                                else
                                {
                                        if( world.sim_run > 0 )
                                                sw_set_achievement( "GOOD_ENOUGH" );
-                                       
+
                                        vg_error( "Level failed :(\n" );
                                }
                                
@@ -1733,6 +2238,21 @@ void vg_update(void)
                        world.sim_frame ++;
                }
                
+               // Sounds
+               if( failure_this_frame )
+               {
+                       sfx_set_play( &audio_tones, &audio_system_balls_extra, 0 );
+               }
+               else if( success_this_frame )
+               {
+                       static int succes_counter = 0;
+                       
+                       sfx_set_play( &audio_tones, &audio_system_balls_extra, 1+(succes_counter++) );
+                       
+                       if( succes_counter == 7 )
+                               succes_counter = 0;
+               }
+               
                // Position update
                // =====================================================================================================
                
@@ -1818,10 +2338,33 @@ void vg_update(void)
        }
 }
 
-void leaderboard_found( LeaderboardFindResult_t *pCallback );
-void leaderboard_downloaded( LeaderboardScoresDownloaded_t *pCallback );
+static void render_tile( v2i pos, struct cell *ptr, v4f const regular_colour, v4f const selected_colour )
+{
+       int selected = world.selected == pos[1]*world.w + pos[0];
+       int uv[2];
+       
+       uv[0] = ptr->config & 0x3;
+       uv[1] = ptr->config >> 2;
+       
+       glUniform4f( SHADER_UNIFORM( shader_tile_main, "uOffset" ), 
+               (float)pos[0], 
+               (float)pos[1], 
+               uv[0], 
+               uv[1] 
+       );
+
+       if( selected )
+       {
+               glUniform4fv( SHADER_UNIFORM( shader_tile_main, "uColour" ), 1, selected_colour );
+               draw_mesh( 0, 2 );
+               glUniform4fv( SHADER_UNIFORM( shader_tile_main, "uColour" ), 1, regular_colour );
+       }
+       else                    
+               draw_mesh( 0, 2 );
+}
 
-static void render_tiles( v2i start, v2i end, v4f const regular_colour, v4f const selected_colour )
+// Renders specific chunk of tiles
+static void render_tile_block( v2i start, v2i end, v4f const regular_colour, v4f const selected_colour )
 {
        v2i full_start = { 0,0 };
        v2i full_end = { world.w, world.h };
@@ -1831,168 +2374,170 @@ static void render_tiles( v2i start, v2i end, v4f const regular_colour, v4f cons
                start = full_start;
                end = full_end;
        }
-       
-       glUniform4fv( SHADER_UNIFORM( shader_tile_main, "uColour" ), 1, regular_colour );
 
        for( int y = start[1]; y < end[1]; y ++ )
        {
                for( int x = start[0]; x < end[0]; x ++ )
                {
-                       struct cell *cell = pcell((v2i){x,y});
-                       int selected = world.selected == y*world.w + x;
-                       
-                       int tile_offsets[][2] =
-                       {
-                               {2, 0}, {0, 3}, {0, 2}, {2, 2},
-                               {1, 0}, {2, 3}, {3, 2}, {1, 3},
-                               {3, 1}, {0, 1}, {1, 2}, {2, 1},
-                               {1, 1}, {3, 3}, {2, 1}, {2, 1}
-                       };
-                       
-                       int uv[2] = { 3, 0 };
-                       
-                       if( cell->state & (FLAG_CANAL|FLAG_INPUT|FLAG_OUTPUT) )
-                       {
-                               uv[0] = tile_offsets[ cell->config ][0];
-                               uv[1] = tile_offsets[ cell->config ][1];
-                       } else continue;
-                       
-                       glUniform4f( SHADER_UNIFORM( shader_tile_main, "uOffset" ), (float)x, (float)y, uv[0], uv[1] );
-                       if( selected )
-                       {
-                               glUniform4fv( SHADER_UNIFORM( shader_tile_main, "uColour" ), 1, selected_colour );
-                               draw_mesh( 0, 2 );
-                               glUniform4fv( SHADER_UNIFORM( shader_tile_main, "uColour" ), 1, regular_colour );
-                       }
-                       else                    
-                               draw_mesh( 0, 2 );
+                       v2i pos = { x, y };
+                       struct cell *cell = pcell( pos );
+
+                       if( cell->state & (FLAG_CANAL|FLAG_INPUT|FLAG_OUTPUT|FLAG_EMITTER) )
+                               render_tile( pos, cell, regular_colour, selected_colour );
                }
        }
 }
 
-/*
-static void draw_numbers( v3f coord, int number )
+// Renders all tiles in the command list
+static void render_tiles( v4f const regular_colour, v4f const selected_colour )
 {
-       v3f pos;
-       v3_copy( coord, pos );
-       int digits[8]; int i = 0;
-       
-       while( number > 0 && i < 8 )
-       {               
-               digits[i ++] = number % 10;
-               number = number / 10;
+       glUniform4fv( SHADER_UNIFORM( shader_tile_main, "uColour" ), 1, regular_colour );
+
+       struct render_list
+       {
+               struct render_cmd *arr;
+               u32 count;
        }
-       
-       for( int j = 0; j < i; j ++ )
+       render_lists[] = { 
+               { world.cmd_buf_tiles, world.tile_count }, 
+               { world.cmd_buf_specials, world.tile_special_count } 
+       };
+
+       for( int i = 0; i < vg_list_size( render_lists ); i ++ )
        {
-               glUniform3fv( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), 1, pos );
-               draw_mesh( MESH_NUMBERS_OFFSETS[digits[i-j-1]][0], MESH_NUMBERS_OFFSETS[digits[i-j-1]][1] );
-               pos[0] += pos[2] * 0.75f;
+               struct render_list *list = &render_lists[i];
+               for( int j = 0; j < list->count; j ++ )
+               {
+                       struct render_cmd *cmd = &list->arr[j];
+                       struct cell *cell = cmd->ptr;
+
+                       render_tile( cmd->pos, cell, regular_colour, selected_colour );
+               }
        }
-}*/
+}
 
-static void wbutton_run( enum e_world_button btn_name )
+static int world_button_exec( struct world_button *btn, v2f texture, v3f colour, enum world_button_status *status )
 {
-       static v3f button_colours[] = {
-               {0.204f, 0.345f, 0.553f},
-               {0.204f, 0.345f, 0.553f},
-               {0.741f, 0.513f, 0.078f},
-               {1.0f, 0.0f, 0.0f}
-       };
+       static v2i click_grab = { -9999, -9999 };
 
-       struct cell_button *btn = &world.buttons[btn_name];
-       
-       // Interaction
+       // Reset click_grab
+       if( !btn )
+       {
+               click_grab[0] = -9999;
+               click_grab[1] = -9999;
+               return 0;
+       }
+
+       v2i click_tile = { world.tile_x, world.tile_y };
+
+       int triggered = 0;
+       int is_hovering = v2i_eq( click_tile, btn->position );
+
+       // Set up light targets before logic runs
+       if( btn->state )
+               btn->light_target = is_hovering? 0.9f: 0.8f;
+       else
+               btn->light_target = is_hovering? 0.2f: 0.0f;
+
+       if( vg_get_button( "primary" ) && is_hovering )
+               btn->light_target = 1.0f;
        
-       int is_hovering = (world.tile_x == world.w-1 && world.tile_y == world.h-btn_name-2)?1:0;        
-       if( vg_get_button_up( "primary" ) && is_hovering )
+       // Process click action
+       if( is_hovering )
        {
-               // Click event
-               if( btn_name == k_world_button_sim )
+               if( vg_get_button_down( "primary" ) && is_hovering )
+                       v2i_copy( click_tile, click_grab );
+               else if( v2i_eq( click_grab, click_tile ) && vg_get_button_up( "primary" ) )
                {
-                       if( world.buttons[ k_world_button_pause ].pressed )
-                       {
-                               if( !btn->pressed )
-                               {
-                                       btn->pressed = 1;
-                                       simulation_start();
-                                       
-                                       world.pause_offset_target = 0.5f;
-                               }
-                               else
-                                       world.pause_offset_target += 1.0f;
-                       }
-                       else
-                       {
-                               btn->pressed ^= 0x1;
-                               
-                               if( btn->pressed )
-                                       simulation_start();
-                               else
-                                       simulation_stop();
-                       }
+                       // Click event
+                       *status = btn->state? k_world_button_on_disable: k_world_button_on_enable;
+                       
+                       if( btn->mode == k_world_button_mode_toggle )
+                               btn->state ^= 0x1;
+                       
+                       sfx_set_play( &audio_clicks, &audio_system_ui, btn->state? 1:0 );
+                       triggered = 1;
                }
-               else if( btn_name == k_world_button_pause )
-               {
-                       btn->pressed ^= 0x1;
+       }
+
+       // Drawing stage
+       v4f final_colour;
+       
+       btn->light = vg_lerpf( btn->light, btn->light_target + btn->extra_light, vg_time_delta*26.0f );
+
+       v3_copy( colour, final_colour );
+       final_colour[3] = btn->light;
+
+       glUniform4f( SHADER_UNIFORM( shader_buttons, "uOffset" ),
+               btn->position[0],
+               btn->position[1],
+               texture[0],
+               texture[1]
+       );
+       glUniform4fv( SHADER_UNIFORM( shader_buttons, "uColour" ), 1, final_colour );
+       draw_mesh( 0, 2 );
+
+       return triggered;
+}
+
+static void level_selection_buttons(void)
+{
+       v3f tutorial_colour = { 0.204f, 0.345f, 0.553f };
+       v3f locked_colour = { 0.2f, 0.2f, 0.2f };
+
+       struct cmp_level *switch_level_to = NULL;
+
+       for( int i = 0; i < vg_list_size( career_packs ); i ++ )
+       {
+               struct career_level_pack *grid = &career_packs[i];
                
-                       world.sim_internal_ref = world.sim_internal_time;
-                       world.sim_delta_ref = vg_time;
-                       
-                       if( btn->pressed )
+               for( int j = 0; j < grid->count; j ++ )
+               {
+                       struct cmp_level *lvl = &grid->pack[ j ];
+                               
+                       if( world.pCmpLevel == lvl )
+                               lvl->btn.extra_light = 0.35f + fabsf(sinf( vg_time * 2.0f )) * 0.05f;   
+                       else lvl->btn.extra_light = 0.2f;
+                       
+                       if( lvl->completed_score )
+                               lvl->btn.extra_light += 0.8f;
+                       
+                       enum world_button_status status;
+                       if( world_button_exec( 
+                               &lvl->btn, 
+                               (v2f){0.0f,0.0f}, 
+                               lvl->unlocked? (lvl->is_tutorial? tutorial_colour: grid->primary_colour): locked_colour,
+                               &status 
+                       ))
                        {
-                               float time_frac = world.sim_internal_time-floorf(world.sim_internal_time);
-                               world.pause_offset_target = 0.5f - time_frac;
+                               if( status == k_world_button_on_enable && lvl->unlocked )
+                                       switch_level_to = lvl;
                        }
-                       else
-                               world.pause_offset_target = 0.0f;
                }
-               else
-               {
-                       btn->pressed ^= 0x1;
-               }
-               
-               sfx_set_play( &audio_clicks, &audio_system_ui, btn->pressed?1:0 );
        }
        
-       // Drawing
-       if( btn->pressed ) 
+       if( switch_level_to )
        {
-               if( is_hovering )
+               world.st.lvl_to_load = switch_level_to;
+               world.st.lvl_load_time = vg_time + 0.25f;
+               world.st.world_transition = 1.0f;
+
+               /*
+               if( console_changelevel( 1, &switch_level_to->map_name ) )
                {
-                       btn->light_target = 0.9f;
+                       world.pCmpLevel = switch_level_to;
+                       gen_level_text( world.pCmpLevel );
                }
-               else
-               {
-                       if( btn_name == k_world_button_sim && world.buttons[ k_world_button_pause ].pressed )
-                               btn->light_target = fabsf(sinf( vg_time * 2.0f )) * 0.3f + 0.3f;
-                       else
-                               btn->light_target = 0.8f;
-               }
-       }
-       else 
-       {
-               btn->light_target = is_hovering? 0.2f: 0.0f;
+               */
        }
+}
 
-       if( vg_get_button( "primary" ) && is_hovering )
-               btn->light_target = 1.0f;
-       
-       btn->light = vg_lerpf( btn->light, btn->light_target, vg_time_delta*26.0f );
-       
-       // Draw
-       
-       v4f final_colour;
-       v3_copy( button_colours[ btn_name ], final_colour );
-       final_colour[3] = btn->light;
-       
-       glUniform4f( SHADER_UNIFORM( shader_buttons, "uOffset" ), 
-               world.w-1, 
-               world.h-btn_name-2, 
-               (float)btn_name, 
-               3.0f 
-       );
-       glUniform4fv( SHADER_UNIFORM( shader_buttons, "uColour" ), 1, final_colour );
+static void render_sprite( enum sprites_auto_combine_index id, v3f pos )
+{
+       struct vg_sprite *sp = &sprites_auto_combine[ id ];
+
+       glUniform4fv( SHADER_UNIFORM( shader_sprite, "uUv" ), 1, sp->uv_xywh );
+       glUniform3f( SHADER_UNIFORM( shader_sprite, "uPos" ), pos[0], pos[1], pos[2] * world.st.world_transition );
        
        draw_mesh( 0, 2 );
 }
@@ -2014,6 +2559,42 @@ void vg_render(void)
        int const empty_start = circle_base+32;
        int const empty_count = circle_base+32*2;
        
+   struct world_theme *theme = &world_themes[ world_theme_id ];
+
+       if( !world.initialzed )
+               return;
+
+       // Extract render commands
+       world.tile_count = 0;
+       world.tile_special_count = 0;
+
+       for( int y = 1; y < world.h-1; y ++ )
+       {
+               for( int x = 1; x < world.w-1; x ++ )
+               {
+                       struct cell *cell = pcell((v2i){x,y});
+                       
+                       if( cell->state & (FLAG_CANAL|FLAG_INPUT|FLAG_OUTPUT|FLAG_EMITTER|FLAG_INPUT_NICE) )
+                       {
+                               struct render_cmd *cmd;
+
+                               if( 
+               (cell->config == k_cell_type_split && (cell->state & FLAG_CANAL)) 
+               || (cell->state & (FLAG_EMITTER|FLAG_IS_TRIGGER)) 
+            )
+                                       cmd = &world.cmd_buf_tiles[ world.max_commands - (++ world.tile_special_count) ];
+                               else
+                                       cmd = &world.cmd_buf_tiles[ world.tile_count ++ ];
+
+                               cmd->pos[0] = x;
+                               cmd->pos[1] = y;
+                               cmd->ptr = cell;
+                       }
+               }
+       }
+
+       world.cmd_buf_specials = &world.cmd_buf_tiles[ world.max_commands - world.tile_special_count ];
+       
        // BACKGROUND
        // ========================================================================================================
        use_mesh( &world.shapes );
@@ -2031,7 +2612,8 @@ void vg_render(void)
        glActiveTexture( GL_TEXTURE1 );
        glBindTexture( GL_TEXTURE_2D, world.random_samples );
        glUniform1i( SHADER_UNIFORM( shader_background, "uSamplerNoise" ), 1 );
-       
+       glUniform1f( SHADER_UNIFORM( shader_background, "uVisibility" ), 1.0f ); //world.st.world_transition );
+
        draw_mesh( 0, 2 );
        
        // TILESET BACKGROUND LAYER
@@ -2045,19 +2627,19 @@ void vg_render(void)
        glUniformMatrix3fv( SHADER_UNIFORM( shader_tile_main, "uPv" ), 1, GL_FALSE, (float *)vg_pv );
        glUniform1f( SHADER_UNIFORM( shader_tile_main, "uGhost" ), 0.0f );
        glUniform1f( SHADER_UNIFORM( shader_tile_main, "uForeground" ), 0.0f );
+       glUniform1f( SHADER_UNIFORM( shader_tile_main, "uVisibility" ), world.st.world_transition * 2.0f );
        
        glEnable(GL_BLEND);
        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
        glBlendEquation(GL_FUNC_ADD);
        
-       // Bind textures
+       // rebind textures
        vg_tex2d_bind( &tex_tile_data, 0 );
-       glUniform1i( SHADER_UNIFORM( shader_tile_main, "uTexGlyphs" ), 0 );
-       
-       vg_tex2d_bind( &tex_wood, 1 );
-       glUniform1i( SHADER_UNIFORM( shader_tile_main, "uTexWood" ), 1 );
-       
-       render_tiles( NULL, NULL, colour_default, colour_default );
+       vg_tex2d_bind( theme->tex_tiles, 1 );
+   
+   glUniform3fv( SHADER_UNIFORM( shader_tile_main, "uShadowing" ), 1, theme->col_shadow );
+
+       render_tiles( colour_default, colour_default );
        
        // MARBLES
        // ========================================================================================================
@@ -2067,7 +2649,7 @@ void vg_render(void)
        vg_tex2d_bind( &tex_ball_noise, 0 );
        glUniform1i( SHADER_UNIFORM( shader_ball, "uTexMain" ), 0 );
        
-       if( get_wbutton( k_world_button_sim )->pressed )
+       if( world.st.buttons[ k_world_button_sim ].state )
        {
                for( int i = 0; i < world.num_fishes; i ++ )
                {
@@ -2096,7 +2678,7 @@ void vg_render(void)
                        v2_copy( fish->physics_co, render_pos );
                        
                        v4f dot_colour = { 0.0f, 0.0f, 0.0f, 1.0f };
-                       colour_code_v3( fish->payload, dot_colour );
+                       colour_code_v3( fish->colour, dot_colour );
                        
                        glUniform3fv( SHADER_UNIFORM( shader_ball, "uColour" ), 1, dot_colour );
                        glUniform3fv( SHADER_UNIFORM( shader_ball, "uOffset" ), 1, render_pos );
@@ -2113,55 +2695,51 @@ void vg_render(void)
        vg_tex2d_bind( &tex_tile_data, 0 );
        glUniform1i( SHADER_UNIFORM( shader_tile_main, "uTexGlyphs" ), 0 );
        
-       vg_tex2d_bind( &tex_wood, 1 );
+   // TODO: is this needed to be rebinded?
+       vg_tex2d_bind( theme->tex_tiles, 1 );
        glUniform1i( SHADER_UNIFORM( shader_tile_main, "uTexWood" ), 1 );
        
        glUniform1f( SHADER_UNIFORM( shader_tile_main, "uForeground" ), 1.0f );
-       render_tiles( NULL, NULL, colour_default, colour_selected  );
+       render_tiles( colour_default, colour_selected );
 
        //      Draw splitters
-       for( int y = 2; y < world.h-2; y ++ )
+       for( int i = 0; i < world.tile_special_count; i ++ )
        {
-               for( int x = 2; x < world.w-2; x ++ )
-               {
-                       struct cell *cell = pcell((v2i){x,y});
+               struct render_cmd *cmd = &world.cmd_buf_specials[i];
+               struct cell *cell = cmd->ptr;
 
-                       if( cell->state & FLAG_CANAL )
+               if( cell->config == k_cell_type_split )
+               {
+                       float rotation = cell->state & FLAG_FLIP_FLOP? vg_rad( -45.0f ): vg_rad( 45.0f );
+                       
+                       if( cell->state & FLAG_FLIP_ROTATING )
                        {
-                               if( cell->config == k_cell_type_split )
+                               if( (world.frame_lerp > curve_7_linear_section) )
                                {
-                                       float rotation = cell->state & FLAG_FLIP_FLOP? vg_rad( -45.0f ): vg_rad( 45.0f );
-                                       
-                                       if( cell->state & FLAG_FLIP_ROTATING )
+                                       float const rotation_speed = 0.4f;
+                                       if( (world.frame_lerp < 1.0f-rotation_speed) )
                                        {
-                                               if( (world.frame_lerp > curve_7_linear_section) )
-                                               {
-                                                       float const rotation_speed = 0.4f;
-                                                       if( (world.frame_lerp < 1.0f-rotation_speed) )
-                                                       {
-                                                               float t = world.frame_lerp - curve_7_linear_section;
-                                                               t *= -2.0f * (1.0f/(1.0f-(curve_7_linear_section+rotation_speed)));
-                                                               t += 1.0f;
-                                                               
-                                                               rotation *= t;
-                                                       }
-                                                       else
-                                                               rotation *= -1.0f;
-                                               }
+                                               float t = world.frame_lerp - curve_7_linear_section;
+                                               t *= -2.0f * (1.0f/(1.0f-(curve_7_linear_section+rotation_speed)));
+                                               t += 1.0f;
+                                               
+                                               rotation *= t;
                                        }
-
-                                       m2x2_create_rotation( subtransform, rotation );
-
-                                       glUniformMatrix2fv( SHADER_UNIFORM( shader_tile_main, "uSubTransform" ), 1, GL_FALSE, (float *)subtransform );  
-                                       glUniform4f( SHADER_UNIFORM( shader_tile_main, "uOffset" ), 
-                                               (float)x, 
-                                               (float)y + 0.125f, 
-                                               cell->state & FLAG_TARGETED? 3.0f: 0.0f, 
-                                               0.0f 
-                                       );
-                                       draw_mesh( 0, 2 );
+                                       else
+                                               rotation *= -1.0f;
                                }
                        }
+
+                       m2x2_create_rotation( subtransform, rotation );
+
+                       glUniformMatrix2fv( SHADER_UNIFORM( shader_tile_main, "uSubTransform" ), 1, GL_FALSE, (float *)subtransform );  
+                       glUniform4f( SHADER_UNIFORM( shader_tile_main, "uOffset" ), 
+                               (float)cmd->pos[0], 
+                               (float)cmd->pos[1] + 0.125f, 
+                               cell->state & FLAG_TARGETED? 3.0f: 2.0f, 
+                               3.0f 
+                       );
+                       draw_mesh( 0, 2 );
                }
        }
        
@@ -2180,7 +2758,7 @@ void vg_render(void)
                glUniformMatrix2fv( SHADER_UNIFORM( shader_tile_main, "uSubTransform" ), 1, GL_FALSE, (float *)subtransform );  
                glUniform2fv( SHADER_UNIFORM( shader_tile_main, "uMousePos" ), 1, world.tile_pos );
                
-               render_tiles( new_begin, new_end, colour_default, colour_default );
+               render_tile_block( new_begin, new_end, colour_default, colour_default );
                
                world.data[ world.selected ].state ^= FLAG_CANAL;
                map_reclassify( new_begin, new_end, 0 );
@@ -2194,160 +2772,109 @@ void vg_render(void)
        vg_tex2d_bind( &tex_buttons, 0 );
        glUniform1i( SHADER_UNIFORM( shader_buttons, "uTexMain" ), 0 );
        
-       wbutton_run( k_world_button_sim );
-       wbutton_run( k_world_button_pause );
-       //wbutton_run( k_world_button_wire_mode );
-       
-       // WIRES
-       // ========================================================================================================
-       //glDisable(GL_BLEND);
+       enum world_button_status stat;
+       int world_paused = world.st.buttons[k_world_button_pause].state;
+       int world_running = world.st.buttons[k_world_button_sim].state;
 
-       SHADER_USE( shader_wire );
-       glBindVertexArray( world.wire.vao );
+       float sim_icon_x = world_paused? 3.0f: (world_running? 2.0f: 0.0f);
 
-       glUniformMatrix3fv( SHADER_UNIFORM( shader_wire, "uPv" ), 1, GL_FALSE, (float *)vg_pv );
-       
-       v4f const wire_left_colour = { 0.5f, 0.5f, 0.5f, 1.0f };
-       v4f const wire_right_colour = { 0.2f, 0.2f, 0.2f, 1.0f };
-       v4f const wire_drag_colour = { 0.2f, 0.2f, 0.2f, 0.6f };
-       
-       glUniform1f( SHADER_UNIFORM( shader_wire, "uTime" ), world.frame_lerp );
-       glUniform1f( SHADER_UNIFORM( shader_wire, "uGlow" ), 0.0f );
-       
-       if( world.id_drag_from )
-       {
-               glUniform4fv( SHADER_UNIFORM( shader_wire, "uColour" ), 1, wire_drag_colour );
-               glUniform1f( SHADER_UNIFORM( shader_wire, "uCurve" ), 0.4f );
-               glUniform3f( SHADER_UNIFORM( shader_wire, "uStart" ), world.drag_from_co[0], world.drag_from_co[1], 0.20f );
-               glUniform3f( SHADER_UNIFORM( shader_wire, "uEnd" ), world.drag_to_co[0], world.drag_to_co[1], 0.20f );
-               glDrawElements( GL_TRIANGLES, world.wire.em, GL_UNSIGNED_SHORT, (void*)(0) );
-       }
-       
-       // Pulling animation
-       float rp_x1 = world.frame_lerp*9.0f;
-       float rp_xa = rp_x1*expf(1.0f-rp_x1)* 0.36f;
-       float rp_x2 = 1.0f-rp_xa;
-       
-       for( int y = 2; y < world.h-2; y ++ )
+       v3f btn_dark_blue = { 0.204f, 0.345f, 0.553f };
+       v3f btn_orange = { 0.553f, 0.345f, 0.204f };
+
+       if( world_button_exec( &world.st.buttons[k_world_button_sim], (v2f){ sim_icon_x, 3.0f }, btn_dark_blue, &stat ))
        {
-               for( int x = 2; x < world.w-2; x ++ )
+               if( stat == k_world_button_on_enable )
                {
-                       struct cell *cell = pcell((v2i){x,y});
+                       simulation_start();
 
-                       if( cell->state & FLAG_CANAL )
+                       if( world_paused )
+                               world.pause_offset_target = 0.5f;
+               }
+               else
+               {
+                       if( world_paused )
                        {
-                               if( cell->state & FLAG_IS_TRIGGER )
-                               {
-                                       struct cell_description *desc = &cell_descriptions[ cell->config ];
-                               
-                                       int trigger_id = cell->links[0]?0:1;
-                                       
-                                       int x2 = cell->links[trigger_id] % world.w;
-                                       int y2 = (cell->links[trigger_id] - x2) / world.w;
-                                       
-                                       v2f startpoint; 
-                                       v2f endpoint;
-                                       
-                                       startpoint[0] = (float)x2 + (trigger_id? 0.75f: 0.25f);
-                                       startpoint[1] = (float)y2 + 0.25f;
-                                       
-                                       endpoint[0] = x;
-                                       endpoint[1] = y;
-                                       
-                                       v2_add( desc->trigger_pos, endpoint, endpoint );
-                                       
-                                       glUniform4fv( SHADER_UNIFORM( shader_wire, "uColour" ), 1, trigger_id? wire_right_colour: wire_left_colour );
-                                       glUniform1f( SHADER_UNIFORM( shader_wire, "uCurve" ), cell->state & FLAG_TRIGGERED? rp_x2 * 0.4f: 0.4f );
-                                       glUniform1f( SHADER_UNIFORM( shader_wire, "uGlow" ), cell->state & FLAG_TRIGGERED? rp_xa: 0.0f );
-                                       glUniform3f( SHADER_UNIFORM( shader_wire, "uStart" ), startpoint[0], startpoint[1], 0.18f );
-                                       glUniform3f( SHADER_UNIFORM( shader_wire, "uEnd" ), endpoint[0], endpoint[1], 0.18f );
-                                       glDrawElements( GL_TRIANGLES, world.wire.em, GL_UNSIGNED_SHORT, (void*)(0) );
-                               }
+                               // Trigger single step
+                               world.pause_offset_target += 1.0f;
+                               world.st.buttons[k_world_button_sim].state = 1;
+                       }
+                       else
+                       {
+                               simulation_stop();
                        }
                }
        }
        
-       // WIRE ENDPOINTS
-       // ========================================================================================================
-       
-       SHADER_USE( shader_tile_colour );
-       glUniformMatrix3fv( SHADER_UNIFORM( shader_tile_colour, "uPv" ), 1, GL_FALSE, (float *)vg_pv );
-       use_mesh( &world.shapes );
-       
-       for( int y = 2; y < world.h-2; y ++ )
+       if( world_button_exec( &world.st.buttons[k_world_button_pause], (v2f){ 1.0f, 3.0f }, btn_dark_blue, &stat ))
        {
-               for( int x = 2; x < world.w-2; x ++ )
-               {
-                       struct cell *cell = pcell((v2i){x,y});
+               world.sim_internal_ref = world.sim_internal_time;
+               world.sim_delta_ref = vg_time;
 
-                       if( cell->state & FLAG_CANAL )
-                       {
-                               if( cell->state & FLAG_IS_TRIGGER )
-                               {
-                                       struct cell_description *desc = &cell_descriptions[ cell->config ];
-                               
-                                       int trigger_id = cell->links[0]?0:1;
-                                       
-                                       int x2 = cell->links[trigger_id] % world.w;
-                                       int y2 = (cell->links[trigger_id] - x2) / world.w;
-                                       
-                                       v2f pts[2];
-                                       
-                                       pts[0][0] = (float)x2 + (trigger_id? 0.75f: 0.25f);
-                                       pts[0][1] = (float)y2 + 0.25f;
-                                       
-                                       pts[1][0] = x;
-                                       pts[1][1] = y;
-                                       
-                                       v2_add( desc->trigger_pos, pts[1], pts[1] );
-                                       
-                                       glUniform4fv( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 
-                                                       1, trigger_id? wire_right_colour: wire_left_colour );
-                                       
-                                       for( int i = 0; i < 2; i ++ )
-                                       {
-                                               glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), 
-                                                       pts[i][0],
-                                                       pts[i][1], 
-                                                       0.08f 
-                                               );
-                                               draw_mesh( filled_start, filled_count );        
-                                       }
-                               }
-                       }
+               if( stat == k_world_button_on_enable )
+               {
+                       float time_frac = world.sim_internal_time-floorf(world.sim_internal_time);
+                       world.pause_offset_target = 0.5f - time_frac;
                }
+               else
+                       world.pause_offset_target = 0.0f;
        }
-       
-       // SUB SPLITTER DIRECTION
-       // ========================================================================================================
-       
-       glUniform4f( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 0.9f, 0.35f, 0.1f, 0.75f );
-       
-       for( int y = 2; y < world.h-2; y ++ )
+
+       if( world_button_exec( &world.st.buttons[k_world_button_speedy], (v2f){ 0.0f, 2.0f }, btn_orange, &stat ))
        {
-               for( int x = 2; x < world.w-2; x ++ )
+               world.sim_delta_speed = stat == k_world_button_on_enable? 10.0f: 2.5f;
+               
+               if( !world_paused )
                {
-                       struct cell *cell = pcell((v2i){x,y});
-
-                       if( cell->state & FLAG_CANAL && cell->state & FLAG_TARGETED && cell->config == k_cell_type_split )
-                       {
-                               glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), x, y, 1.0f );
-                               draw_mesh( cell->state & FLAG_FLIP_FLOP? 5: 4, 1 );
-                       }
+                       world.sim_delta_ref = vg_time;
+                       world.sim_internal_ref = world.sim_internal_time;
                }
        }
+
+       if( world_button_exec( &world.st.buttons[k_world_button_settings], (v2f){ 1.0f, 2.0f }, btn_orange, &stat ))
+       {
+               world.st.state = stat == k_world_button_on_enable? k_game_state_settings: k_game_state_main;    
+       }
+
+       level_selection_buttons();
+       
+       if( vg_get_button_up( "primary" ) )
+               world_button_exec( NULL, NULL, NULL, NULL );
        
        // I/O ARRAYS
        // ========================================================================================================
        
        //glEnable(GL_BLEND);
-       
+       SHADER_USE( shader_tile_colour );
+       glUniformMatrix3fv( SHADER_UNIFORM( shader_tile_colour, "uPv" ), 1, GL_FALSE, (float *)vg_pv );
+
        for( int i = 0; i < arrlen( world.io ); i ++ )
        {
                struct cell_terminal *term = &world.io[ i ];
-               int is_input = pcell(term->pos)->state & FLAG_INPUT;
+               struct cell *cell = pcell(term->pos);
 
+               int is_input = cell->state & FLAG_INPUT;
                v4f dot_colour = { 0.0f, 0.0f, 0.0f, 1.0f };
+
+      if( cell->state & FLAG_EMITTER )
+      {
+         for( int j = 0; j < 2; j ++ )
+         {
+            if( cell->emit[j] != -1 )
+            {
+               colour_code_v3( cell->emit[j], dot_colour );
+               
+               glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), 
+                  term->pos[0] + 0.25f + (float)j * 0.5f, 
+                  term->pos[1] + 0.25f,
+                  0.12f
+               );
+
+               glUniform4fv( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 1, dot_colour );
+               draw_mesh( filled_start, filled_count );
+            }
+         }
+         continue;
+      }
                
                for( int k = 0; k < term->run_count; k ++ )
                {
@@ -2386,11 +2913,13 @@ void vg_render(void)
                        if( bar_draw )
                        {
                                glUniform4fv( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 1, bar_colour );
-                               glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), (float)term->pos[0], y_position - 0.1f, 1.0f );
+                               glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), 
+               (float)term->pos[0], y_position - 0.1f, 1.0f );
+
                                draw_mesh( 2, 2 );
                        }
                        
-                       for( int j = 0; j < term->runs[k].condition_count; j ++ )
+                       for( int j = 0; j < term->runs[k].step_count; j ++ )
                        {
                                glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), 
                                        (float)term->pos[0] + 0.2f + 0.2f * (float)j, 
@@ -2400,10 +2929,10 @@ void vg_render(void)
                        
                                if( is_input )
                                {
-                                       char cc = term->runs[k].conditions[j];
-                                       if( cc != ' ' )
+                                       i8 colour = term->runs[k].steps[j];
+                                       if( colour != -1 )
                                        {                                       
-                                               colour_code_v3( cc, dot_colour );
+                                               colour_code_v3( colour, dot_colour );
                                                glUniform4fv( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 1, dot_colour );
                                        
                                                // Draw filled if tick not passed, draw empty if empty
@@ -2425,7 +2954,7 @@ void vg_render(void)
                                                draw_mesh( filled_start, filled_count );
                                        }
                                        
-                                       colour_code_v3( term->runs[k].conditions[j], dot_colour );
+                                       colour_code_v3( term->runs[k].steps[j], dot_colour );
                                        glUniform4fv( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 1, dot_colour );
                                        
                                        draw_mesh( empty_start, empty_count );
@@ -2433,396 +2962,465 @@ void vg_render(void)
                        }
                }
        }
+
+       // SPRITES
+       // ========================================================================================================
+       SHADER_USE( shader_sprite );
+       glUniformMatrix3fv( SHADER_UNIFORM( shader_sprite, "uPv" ), 1, GL_FALSE, (float *)vg_pv );
+
+       vg_tex2d_bind( &tex_sprites, 0 );
+       glUniform1i( SHADER_UNIFORM( shader_sprite, "uTexMain" ), 0 );
        
-       glDisable(GL_BLEND);
-       
-       // Draw score
-       /*
-       float const score_bright = 1.25f;
-       glUniform4f( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 
-               0.4f*score_bright, 0.39f*score_bright, 0.45f*score_bright, 1.0f );
-               
-       use_mesh( &world.numbers );
-       draw_numbers( (v3f){ 2.0f, (float)world.h-1.875f, 0.3333f }, world.score );
-       */
-}
+       for( int i = 0; i < world.tile_special_count; i ++ )
+       {
+               struct render_cmd *cmd = &world.cmd_buf_specials[i];
+               struct cell *cell = cmd->ptr;
 
-static ui_colourset flcol_list_a = {
-       .main = 0xff877979,
-       .hover = 0xffa09393,
-       .active = 0xffbfb1b0
-};
-static ui_colourset flcol_list_b = {
-       .main = 0xff7c6e6e,
-       .hover = 0xffa09393,
-       .active = 0xffbfb1b0
-};
+               if( (cell->config == k_cell_type_split) || (cell->state & FLAG_EMITTER) )
+               {
+                       v2f center = { cmd->pos[0] + 0.5f, cmd->pos[1] + 0.5f };
 
-static ui_colourset flcol_list_complete_a = {
-       .main = 0xff62a064,
-       .hover = 0xff8dc18f,
-       .active = 0xffb2ddb3
-};
+                       v3f p0 = { 0.0f, 0.0f, 4.0f };
+                       v3f p1 = { 0.0f, 0.0f, 4.0f };
 
-static ui_colourset flcol_list_complete_b = {
-       .main = 0xff79b37b,
-       .hover = 0xff8dc18f,
-       .active = 0xffb2ddb3
-};
+                       v2_add( center, (v2f){ -0.25f, -0.25f }, p0 );
+                       v2_add( center, (v2f){  0.25f, -0.25f }, p1 );
 
-static ui_colourset flcol_list_locked = {
-       .main = 0xff655959,
-       .hover = 0xff655959,
-       .active = 0xff655959
-};
+                       render_sprite( k_sprite_jack_1, p0 );
+                       render_sprite( k_sprite_jack_2, p1 );
+               }
+      else if( cell->state & FLAG_IS_TRIGGER )
+      {
+         v3f p0 = { 0.0f, 0.0f, 4.0f };
+         
+         struct cell_description *desc = &cell_descriptions[ cell->config ];
+
+         v2_add( (v2f){ cmd->pos[0], cmd->pos[1] }, desc->trigger_pos, p0 );
+         render_sprite( desc->trigger_sprite, p0 );
+      }
+       }
 
-static struct
-{
-       SteamLeaderboard_t steam_leaderboard;
-       int leaderboard_show;
+       // TEXT ELEMENTS
+       // ========================================================================================================
+   // Old style
+   m3x3f mvp_text;
+   m3x3_identity( mvp_text );
+   m3x3_scale( mvp_text, (v3f){ 
+      1.0f/  ((float)UI_GLYPH_SPACING_X*4.0f),
+      1.0f/ -((float)UI_GLYPH_SPACING_X*4.0f), 
+      1.0f 
+   });
+
+   m3x3_mul( vg_pv, mvp_text, mvp_text );
+   ui_draw( &world.st.world_text, mvp_text );
+
+       // WIRES
+       // ========================================================================================================
+       glEnable(GL_BLEND);
+
+       SHADER_USE( shader_wire );
+       glBindVertexArray( world.wire.vao );
+
+       glUniformMatrix3fv( SHADER_UNIFORM( shader_wire, "uPv" ), 1, GL_FALSE, (float *)vg_pv );
        
-       struct leaderboard_player
-       {
-               // Internal
-               u64_steamid id;
-               i32 score;
-               int is_local_player;
-               
-               // To be displayed
-               char score_text[ 16 ];
-               char player_name[ 48 ];
-               GLuint texture;                 // Not dynamic
-       }
-       leaderboard_players[10];
-       int leaderboard_count;
+       v4f const wire_left_colour = { 0.5f, 0.5f, 0.5f, 1.0f };
+       v4f const wire_right_colour = { 0.2f, 0.2f, 0.2f, 1.0f };
+       v4f const wire_drag_colour = { 0.2f, 0.2f, 0.2f, 0.6f };
        
-       struct
-       {
-               struct cmp_level *level;
-               
-               i32 score;
-               int is_waiting;
-       }
-       upload_request;
+       glUniform1f( SHADER_UNIFORM( shader_wire, "uTime" ), world.frame_lerp );
+       glUniform1f( SHADER_UNIFORM( shader_wire, "uGlow" ), 0.0f );
        
-       struct cmp_level *level_selected;
-} 
-ui_data;
-
-void vg_ui(void)
-{
-       // UI memory
-       static int pack_selection = 0;
-       static struct pack_info
+       if( world.id_drag_from )
        {
-               struct cmp_level *levels;
-               u32 level_count;
-               const char *name;
+               glUniform4fv( SHADER_UNIFORM( shader_wire, "uColour" ), 1, wire_drag_colour );
+               glUniform1f( SHADER_UNIFORM( shader_wire, "uCurve" ), 0.4f );
+               glUniform3f( SHADER_UNIFORM( shader_wire, "uStart" ), world.drag_from_co[0], world.drag_from_co[1], 0.20f*world.st.world_transition );
+               glUniform3f( SHADER_UNIFORM( shader_wire, "uEnd" ), world.drag_to_co[0], world.drag_to_co[1], 0.20f*world.st.world_transition );
+               glDrawElements( GL_TRIANGLES, world.wire.em, GL_UNSIGNED_SHORT, (void*)(0) );
        }
-       pack_infos[] = 
+       
+       // Pulling animation
+       float rp_x1 = world.frame_lerp*9.0f;
+       float rp_xa = rp_x1*expf(1.0f-rp_x1)* 0.36f;
+       float rp_x2 = 1.0f-rp_xa;
+       
+       for( int i = 0; i < world.tile_special_count; i ++ )
        {
+               struct render_cmd *cmd = &world.cmd_buf_specials[i];
+               struct cell *cell = cmd->ptr;
+
+               if( cell->state & FLAG_TARGETED )
                {
-                       .levels = cmp_levels_tutorials,
-                       .level_count = vg_list_size(cmp_levels_tutorials),
-                       .name = "Training"
-               },
-               {
-                       .levels = cmp_levels_basic,
-                       .level_count = vg_list_size(cmp_levels_basic),
-                       .name = "Main"
-               },
-               {
-                       .levels = cmp_levels_grad,
-                       .level_count = vg_list_size(cmp_levels_tutorials),
-                       .name = "Expert"
+                       for( int j = 0; j < 2; j ++ )
+                       {
+                               if( !cell->links[j] )
+                                       continue;
+
+                               struct cell *other_cell = &world.data[ cell->links[ j ]];
+                               struct cell_description *desc = &cell_descriptions[ other_cell->config ];
+                               
+                               int x2 = cell->links[j] % world.w;
+                               int y2 = (cell->links[j] - x2) / world.w;
+                               
+                               v2f startpoint; 
+                               v2f endpoint;
+                               
+                               endpoint[0] = (float)cmd->pos[0] + (j? 0.75f: 0.25f);
+                               endpoint[1] = (float)cmd->pos[1] + 0.25f;
+                               
+                               startpoint[0] = x2;
+                               startpoint[1] = y2;
+                               
+                               v2_add( desc->trigger_pos, startpoint, startpoint );
+                               
+                               if( cmd->ptr->state & FLAG_EMITTER )
+                               {
+                                       v4f wire_colour;
+                                       colour_code_v3( cmd->ptr->emit[j], wire_colour );
+                                       wire_colour[3] = 1.0f;
+
+                                       glUniform4fv( SHADER_UNIFORM( shader_wire, "uColour" ), 1, wire_colour );
+                               }
+                               else
+                                       glUniform4fv( SHADER_UNIFORM( shader_wire, "uColour" ), 1, j? wire_right_colour: wire_left_colour );
+
+                               glUniform1f( SHADER_UNIFORM( shader_wire, "uCurve" ), other_cell->state & FLAG_TRIGGERED? rp_x2 * 0.4f: 0.4f );
+                               glUniform1f( SHADER_UNIFORM( shader_wire, "uGlow" ), other_cell->state & FLAG_TRIGGERED? rp_xa: 0.0f );
+                               glUniform3f( SHADER_UNIFORM( shader_wire, "uEnd" ), startpoint[0], startpoint[1], 0.18f*world.st.world_transition );
+                               glUniform3f( SHADER_UNIFORM( shader_wire, "uStart" ), endpoint[0], endpoint[1], 0.18f*world.st.world_transition );
+                               glDrawElements( GL_TRIANGLES, world.wire.em, GL_UNSIGNED_SHORT, (void*)(0) );
+                       }
                }
-       };
+       }
        
-       // UI Code
-       ui_global_ctx.cursor[0] = 0;
-       ui_global_ctx.cursor[1] = 0;
-       ui_global_ctx.cursor[2] = 256;
-
-       gui_fill_y();
+       // WIRE ENDPOINTS
+       // ========================================================================================================
        
-       ui_global_ctx.id_base = 4 << 16;
+       SHADER_USE( shader_tile_colour );
+       use_mesh( &world.shapes );
        
-       gui_new_node();
+       for( int i = 0; i < world.tile_special_count; i ++ )
        {
-               gui_capture_mouse( 9999 );
-               gui_fill_rect( ui_global_ctx.cursor, 0xff5a4e4d );
-               
-               gui_text( "ASSIGNMENTS", 8, 0 );
-               
-               ui_global_ctx.cursor[1] += 30;
-               ui_global_ctx.cursor[3] = 25;
-               
-               gui_new_node();
+               struct render_cmd *cmd = &world.cmd_buf_specials[i];
+               struct cell *cell = cmd->ptr;
+
+               if( cell->state & FLAG_TARGETED )
                {
-                       ui_rect_pad( ui_global_ctx.cursor, 2 );
-                       ui_global_ctx.cursor[2] = 84;
-                       
-                       for( int i = 0; i < 3; i ++ )
+                       for( int j = 0; j < 2; j ++ )
                        {
-                               int pack_is_unlocked = pack_infos[i].levels[0].unlocked;
-                       
-                               if( i == pack_selection || !pack_is_unlocked )
-                                       gui_override_colours( &flcol_list_locked );
+                               if( !cell->links[j] )
+                                       continue;
+
+                               struct cell *other_cell = &world.data[ cell->links[ j ]];
+                               struct cell_description *desc = &cell_descriptions[ other_cell->config ];
                                
-                               if( gui_button( 2000 + i ) == k_button_click && pack_is_unlocked )
-                                       pack_selection = i;
+                               int x2 = cell->links[j] % world.w;
+                               int y2 = (cell->links[j] - x2) / world.w;
                                
-                               ui_global_ctx.cursor[1] += 2;
-                               gui_text( pack_is_unlocked? pack_infos[i].name: "???", 4, 0 );
-                               gui_end_right();
+                               v2f pts[2];
                                
-                               gui_reset_colours();
-                       } 
-               }
-               gui_end_down();
-               
-               ui_global_ctx.cursor[3] = 500;
-               
-               // DRAW LEVEL SELECTION LIST
-               {
-                       struct cmp_level *levels = pack_infos[ pack_selection ].levels;
-                       int count = pack_infos[ pack_selection ].level_count;
-
-                       static struct ui_scrollbar sb = {
-                               .bar_height = 400
-                       };
-                       
-                       ui_px view_height = ui_global_ctx.cursor[3];
-                       ui_px level_height = 50;
-
-                       // Level scroll view
-                       gui_new_node();
-                       {
-                               gui_fill_rect( ui_global_ctx.cursor, 0xff5a4e4d );
-                               gui_set_clip( ui_global_ctx.cursor );
+                               pts[0][0] = (float)cmd->pos[0] + (j? 0.75f: 0.25f);
+                               pts[0][1] = (float)cmd->pos[1] + 0.25f;
+                               
+                               pts[1][0] = x2;
+                               pts[1][1] = y2;
                                
-                               ui_global_ctx.cursor[2] = 14;
-                               gui_align_right();
+                               v2_add( desc->trigger_pos, pts[1], pts[1] );
                                
-                               ui_px content_height = count*level_height;
-                               if( content_height > view_height )
+                               if( cell->state & FLAG_EMITTER )
                                {
-                                       ui_scrollbar( &ui_global_ctx, &sb, 1 );
-                                       ui_global_ctx.cursor[1] -= ui_calculate_content_scroll( &sb, content_height );
+                                       v4f wire_colour;
+                                       colour_code_v3( cell->emit[j], wire_colour );
+
+                                       v3_muls( wire_colour, 0.8f, wire_colour );
+                                       wire_colour[3] = 1.0f;
+
+                                       glUniform4fv( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 1, wire_colour );
                                }
                                else
-                               {
-                                       gui_fill_rect( ui_global_ctx.cursor, 0xff807373 );
-                               }
+                                       glUniform4fv( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 1,j?wire_right_colour: wire_left_colour );
                                
-                               ui_global_ctx.cursor[2] = 240;
-                               ui_global_ctx.cursor[3] = level_height;
-                               gui_align_left();
-                               
-                               for( int i = 0; i < count; i ++ )
+                               for( int i = 0; i < 2; i ++ )
                                {
-                                       struct cmp_level *lvl_info = &levels[i];
-                               
-                                       if( lvl_info->unlocked )
-                                       {
-                                               if( lvl_info->completed_score != 0 )
-                                                       gui_override_colours( i&0x1? &flcol_list_complete_a: &flcol_list_complete_b );
-                                               else
-                                                       gui_override_colours( i&0x1? &flcol_list_a: &flcol_list_b );
-                                       }
-                                       else
-                                               gui_override_colours( &flcol_list_locked );
-                                       
-                                       if( lvl_info->unlocked )
-                                       {
-                                               if( gui_button( 2 + i ) == k_button_click )
-                                               {
-                                                       ui_data.level_selected = &levels[i];
-                                                       ui_data.leaderboard_show = 0;
-                                                       
-                                                       if( pack_selection >= 1 )
-                                                               sw_find_leaderboard( ui_data.level_selected->map_name );
-                                               }
-                                               
-                                               ui_global_ctx.override_colour = 0xffffffff;
-                                               gui_text( lvl_info->title, 6, 0 );
-                                               ui_global_ctx.cursor[1] += 18;
-                                               gui_text( lvl_info->completed_score>0? "passed": "incomplete", 4, 0 );
-                                       }
-                                       else
-                                       {
-                                               gui_button( 2 + i );
-                                               
-                                               ui_global_ctx.override_colour = 0xff786f6f;
-                                               gui_text( "???", 6, 0 );
-                                               ui_global_ctx.cursor[1] += 18;
-                                               gui_text( "locked", 4, 0 );
-                                       }
-                                       
-                                       gui_end_down();
+                                       glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), 
+                                               pts[i][0],
+                                               pts[i][1], 
+                                               0.08f * world.st.world_transition
+                                       );
+                                       draw_mesh( filled_start, filled_count );        
                                }
-                               
-                               gui_reset_colours();            
-                               gui_release_clip();
                        }
-                       gui_end_down();
                }
        }
-       gui_end_right();
+
+       // SUB SPLITTER DIRECTION
+       // ========================================================================================================
+   
+   /*
+       glUniform4f( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 0.9f, 0.35f, 0.1f, 0.75f );
+       
+       for( int i = 0; i < world.tile_special_count; i ++ )
+       {
+               struct render_cmd *cmd = &world.cmd_buf_specials[i];
+               struct cell *cell = cmd->ptr;
+
+               if( cell->state & FLAG_TARGETED && cell->config == k_cell_type_split )
+               {
+                       glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), cmd->pos[0], cmd->pos[1], 1.0f );
+                       draw_mesh( cell->state & FLAG_FLIP_FLOP? 5: 4, 1 );
+               }
+       }
+   */
+
+       // LIGHT FLARES
+       // ========================================================================================================
+       glBlendFunc(GL_ONE, GL_ONE);
+       glBlendEquation(GL_FUNC_ADD);
        
-       // Selected level UI
-       // ============================================================
+       SHADER_USE( shader_sprite );
+
+       vg_tex2d_bind( &tex_sprites, 0 );
+       glUniform1i( SHADER_UNIFORM( shader_sprite, "uTexMain" ), 0 );
        
-       if( ui_data.level_selected )
+       for( int i = 0; i < world.tile_special_count; i ++ )
        {
-               ui_global_ctx.cursor[0] += 16;
-               ui_global_ctx.cursor[1] += 16;
-               ui_global_ctx.cursor[2] = 512-40;
-               ui_global_ctx.cursor[3] = 560-16;
+               struct render_cmd *cmd = &world.cmd_buf_specials[i];
+               struct cell *cell = cmd->ptr;
+
+               if( cell->config == k_cell_type_split )
+               {
+                       v2f center = { cmd->pos[0] + 0.5f, cmd->pos[1] + 0.5f };
+
+                       v3f p0 = { 0.0f, 0.0f, 12.0f };
+                       v3f p1 = { 0.0f, 0.0f, 12.0f };
+
+                       v2_add( center, (v2f){ -0.25f, -0.25f }, p0 );
+                       v2_add( center, (v2f){  0.25f, -0.25f }, p1 );
+         
+         if( cell->state & FLAG_TARGETED )
+         {
+                          if( cell->state & FLAG_FLIP_FLOP )
+                               render_sprite( k_sprite_flare_y, p1 );
+                          else
+                                  render_sprite( k_sprite_flare_b, p0 );
+         }
+         else
+            render_sprite( k_sprite_flare_w, cell->state &FLAG_FLIP_FLOP? p1: p0 );
+               }
+       }
+
+       glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+       glBlendEquation(GL_FUNC_ADD);
+
+       
+       glDisable(GL_BLEND);
+       
+       // Draw score
+       /*
+       float const score_bright = 1.25f;
+       glUniform4f( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 
+               0.4f*score_bright, 0.39f*score_bright, 0.45f*score_bright, 1.0f );
                
+       use_mesh( &world.numbers );
+       draw_numbers( (v3f){ 2.0f, (float)world.h-1.875f, 0.3333f }, world.score );
+       */
+}
+
+void vg_ui(void) 
+{
+   // Drawing world name
+   if( world.pCmpLevel )
+   {
+      gui_text( (ui_px [2]){ vg_window_x / 2, 4 }, world.pCmpLevel->title, 2, k_text_align_center );
+      gui_text( (ui_px [2]){ vg_window_x / 2, 28 }, world.pCmpLevel->description, 1, k_text_align_center );
+   }
+
+   if( world.st.state == k_game_state_update )
+   {
+      gui_group_id( 34 );
+
+      ui_global_ctx.cursor[2] = 458;
+      ui_global_ctx.cursor[3] = 316;
+      ui_global_ctx.cursor[0] = vg_window_x / 2 - 229;
+      ui_global_ctx.cursor[1] = vg_window_y / 2 - 158;
+
+      gui_new_node();
+      {
+         gui_capture_mouse( 200 );
+         gui_fill_rect( ui_global_ctx.cursor, 0xE8303030 );
+         
+         ui_px title_pos[2];
+         title_pos[0] = ui_global_ctx.cursor[0] + 229;
+         title_pos[1] = ui_global_ctx.cursor[1] + 16;
+
+         gui_text( title_pos, "Update 1.5", 2, k_text_align_center );
+
+         gui_text( (ui_px [2]){ ui_global_ctx.cursor[0] + 16, title_pos[1] + 45 },
+            "Welcome to the first update to marble computing!"
+            "\n"
+            "New features have been added:\n"
+            "\n"
+            "  - Settings menu\n"
+            "  - Map skins\n"
+            "  - More levels and a new block type\n"
+            "  - Scores for each level\n"
+            "  - Zooming and panning (mousewheel)\n"
+            "\n"
+            "There is much more in the works, such as a\n"
+            "soundtrack, and the rest of the levels for the\n"
+            "3 bit computer!\n"
+            "\n"
+            "Thank you everyone for enjoying my game :)\n",
+            1, k_text_align_left
+         );
+
+         ui_global_ctx.cursor[2] = 100;
+         ui_global_ctx.cursor[3] = 30;
+         ui_global_ctx.cursor[0] += 229 - 50;
+         ui_global_ctx.cursor[1] += 316 - 30 - 16;
+
+         if( gui_button( 1 ) )
+         {
+            world.st.state = k_game_state_main;
+         }
+         gui_text( (ui_px [2]){ ui_global_ctx.cursor[0] + 50,
+            ui_global_ctx.cursor[1] + 4 }, "OK", 1, k_text_align_center );
+         gui_end();
+      }
+      gui_end();
+   }
+   else if( world.st.state == k_game_state_settings )
+       {
+               gui_group_id( 35 );
+
+               ui_global_ctx.cursor[2] = 225;
+               gui_fill_y();
+               gui_align_right();
+
                gui_new_node();
                {
-                       gui_capture_mouse( 9999 );
-                       
-                       gui_fill_rect( ui_global_ctx.cursor, 0xff5a4e4d );
-                       ui_global_ctx.cursor[1] += 4;
-                       gui_text( ui_data.level_selected->title, 6, 0 );
-                       
-                       ui_global_ctx.cursor[1] += 30;
+                       gui_capture_mouse( 200 );
+
+                       gui_fill_rect( ui_global_ctx.cursor, 0xC0202020 );
                        ui_rect_pad( ui_global_ctx.cursor, 8 );
-                       ui_global_ctx.cursor[3] = 300;
-                       
-                       gui_new_node();
-                       {
-                               gui_fill_rect( ui_global_ctx.cursor, 0xff655959 );
-                       }
-                       gui_end_down();
-                       
-                       ui_text_use_paragraph( &ui_global_ctx );
-                       ui_global_ctx.cursor[1] += 2;
                        
-                       gui_text( ui_data.level_selected->description, 5, 0 );
-                       ui_text_use_title( &ui_global_ctx );
-                       
-                       // Buttons at the bottom
                        ui_global_ctx.cursor[3] = 25;
-                       ui_global_ctx.cursor[2] = 80;
-                       
-                       gui_align_bottom();
-                       ui_global_ctx.cursor[1] -= 8;
                        
-                       if( gui_button( 3000 ) == k_button_click )
+                       gui_new_node();
                        {
-                               ui_data.level_selected = NULL;
+                               gui_text( ui_global_ctx.cursor, "SETTINGS", 2, 0 );
                        }
-                       gui_text( "BACK", 6, k_text_alignment_center );
                        gui_end();
-                       
-                       gui_align_right();
-                       ui_global_ctx.cursor[2] = 170;
-                       ui_global_ctx.cursor[0] -= 8 + 170 + 2;
-                       
-                       {
-                               gui_override_colours( &flcol_list_locked );
-                               if( gui_button( 3001 ) == k_button_click )
-                                       vg_error( "UNIMPLEMENTED\n" );
-                               
-                               ui_global_ctx.override_colour = 0xff888888;
-                               
-                               gui_text( "RESTORE SOLUTION", 6, k_text_alignment_center );
-                               gui_end_right();
-                               ui_global_ctx.override_colour = 0xffffffff;
-                       }
-                       
-                       ui_global_ctx.cursor[0] += 2;
-                       ui_global_ctx.cursor[2] = 80;
-                       
+
+                       // Colour scheme selection
+                       ui_global_ctx.cursor[1] += 30;
+
+                       gui_text( ui_global_ctx.cursor, "Colour Scheme", 1, 0 );
+                       ui_global_ctx.cursor[1] += 25;
+
+                       gui_new_node();
                        {
-                               gui_override_colours( &flcol_list_complete_a );
-                               if( gui_button( 3002 ) == k_button_click )
+                               ui_global_ctx.cursor[2] = 50;
+
+                               for( int i = 0; i < 4; i ++ )
                                {
-                                       if( console_changelevel( 1, &ui_data.level_selected->map_name ) )
+                                       gui_new_node();
                                        {
-                                               world.pCmpLevel = ui_data.level_selected;
+                                               // Convert to RGB
+                                               u32 rgb = 0xff000000;
 
-                                               ui_data.level_selected = NULL;
-                                               ui_data.leaderboard_show = 0;
+                                               for( int j = 0; j < 3; j ++ )
+                                                       rgb |= (u32)(colour_sets[ colour_set_id ][i][j]*255.0f) << j * 8;
+
+                                               gui_fill_rect( ui_global_ctx.cursor, rgb );
                                        }
+                                       gui_end_right();
                                }
-                               gui_text( "PLAY", 6, k_text_alignment_center );
-                               gui_end();
                        }
+                       gui_end_down();
                        
-                       gui_reset_colours();
-               }
-               gui_end_right();
-               
-               if( ui_data.leaderboard_show )
-               {
-                       ui_global_ctx.cursor[0] += 16;
-                       ui_global_ctx.cursor[2] = 350;
-                       ui_global_ctx.cursor[3] = 25;
-                       
-                       // If has results
                        gui_new_node();
                        {
-                               gui_fill_rect( ui_global_ctx.cursor, 0xff5a4e4d );
-                               gui_text( "FRIEND LEADERBOARD", 6, 0 );
+                               ui_global_ctx.cursor[2] = 25;
+                               if( gui_button( 0 ) == k_button_click )
+                               {
+                                       if( colour_set_id > 0 )
+                                               colour_set_id --;
+                               }
+                               gui_text( ui_global_ctx.cursor, "<", 2, 0 );
+                               gui_end_right();
+                               
+                               ui_global_ctx.cursor[2] = 150;
+                               gui_new_node();
+                               {
+               gui_fill_rect( ui_global_ctx.cursor, 0x33ffffff );
+                                       gui_text( 
+                  (ui_px [2]){ ui_global_ctx.cursor[0] + 75, ui_global_ctx.cursor[1] + 6 }, 
+                  (const char *[]){ "Normal", "Extra1", "Extra2" }[ colour_set_id ], 
+                  1, k_text_align_center 
+               );
+                               }
+                               gui_end_right();
+
+                               ui_global_ctx.cursor[2] = 25;
+                               if( gui_button( 1 ) == k_button_click )
+                               {
+                                       if( colour_set_id < vg_list_size( colour_sets )-1 )
+                                               colour_set_id ++;
+                               }
+                               gui_text( ui_global_ctx.cursor, ">", 2, 0 );
+                               gui_end_down();
                        }
                        gui_end_down();
-                       
-                       ui_global_ctx.cursor[1] += 2;
-                               
+
+         // Theme select
+         // TODO: remove code dupe
+         ui_global_ctx.cursor[1] += 16;
+
+                       gui_text( ui_global_ctx.cursor, "Tile Theme", 1, 0 );
+                       ui_global_ctx.cursor[1] += 20;
+
                        gui_new_node();
                        {
-                               ui_global_ctx.cursor[3] = 32+8;
+                               ui_global_ctx.cursor[2] = 25;
+                               if( gui_button( 0 ) == k_button_click )
+                               {
+                                       if( world_theme_id > 0 )
+                                               world_theme_id --;
+                               }
+                               gui_text( ui_global_ctx.cursor, "<", 2, 0 );
+                               gui_end_right();
                                
-                               for( int i = 0; i < ui_data.leaderboard_count; i ++ )
+                               ui_global_ctx.cursor[2] = 150;
+                               gui_new_node();
                                {
-                                       gui_new_node();
-                                       {
-                                               gui_fill_rect( ui_global_ctx.cursor, i&0x1? flcol_list_a.main: flcol_list_b.main );
+               gui_fill_rect( ui_global_ctx.cursor, 0x33ffffff );
+                                       gui_text( 
+                  (ui_px [2]){ ui_global_ctx.cursor[0] + 75, ui_global_ctx.cursor[1] + 6 },
+                  world_themes[ world_theme_id ].name, 1, k_text_align_center
+               );
+                               }
+                               gui_end_right();
 
-                                               ui_global_ctx.cursor[0] += 4;
-                                               ui_global_ctx.cursor[1] += 4;                                                   
-                                               
-                                               // 1,2,3 ...
-                                               static const char *places[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9", "10" };
-                                               gui_text( places[i], 7, 0 );
-                                               ui_global_ctx.cursor[0] += 32;
-                                               
-                                               struct leaderboard_player *player = &ui_data.leaderboard_players[i];
-                                               
-                                               // Players image
-                                               ui_global_ctx.cursor[2] = 32;
-                                               ui_global_ctx.cursor[3] = 32;
-                                               
-                                               gui_new_node();
-                                               {
-                                                       gui_push_image( ui_global_ctx.cursor, player->texture );
-                                               }
-                                               gui_end_right();
-                                               
-                                               // Players name
-                                               gui_text( player->player_name, 7, 0 );
-                                               
-                                               ui_global_ctx.cursor[2] = 50;
-                                               gui_align_right();
-                                               
-                                               gui_text( player->score_text, 7, k_text_alignment_right );
-                                       }
-                                       gui_end_down();
-                                       
-                                       ui_global_ctx.cursor[1] += 2;
+                               ui_global_ctx.cursor[2] = 25;
+                               if( gui_button( 1 ) == k_button_click )
+                               {
+                                       if( world_theme_id < vg_list_size( world_themes )-1 )
+                                               world_theme_id ++;
                                }
+                               gui_text( ui_global_ctx.cursor, ">", 2, 0 );
+                               gui_end_down();
                        }
-                       gui_end();
+                       gui_end_down();
                }
+               gui_end();
        }
 }
 
+#if STEAM_LEADERBOARDS
 void leaderboard_dispatch_score(void)
 {
+
        sw_upload_leaderboard_score( 
                ui_data.upload_request.level->steam_leaderboard, 
                k_ELeaderboardUploadScoreMethodKeepBest,
@@ -2922,6 +3520,7 @@ void leaderboard_set_score( struct cmp_level *cmp_level, u32 score )
        else
                sw_find_leaderboard( cmp_level->map_name );
 }
+#endif
 
 // CONSOLE COMMANDS
 // ===========================================================================================================
@@ -3021,8 +3620,10 @@ static int console_changelevel( int argc, char const *argv[] )
        {
                // Save current level
                console_save_map( 0, NULL );
+               
                if( console_load_map( argc, argv ) )
                {                               
+                       world.st.zoom = 0.0f;
                        simulation_stop();
                        return 1;
                }
@@ -3044,8 +3645,10 @@ static int console_changelevel( int argc, char const *argv[] )
 void vg_start(void)
 {
        // Steamworks callbacks
+       #ifdef STEAM_LEADERBOARDS
        sw_leaderboard_found = &leaderboard_found;
        sw_leaderboard_downloaded = &leaderboard_downloaded;
+       #endif
 
        vg_function_push( (struct vg_cmd){
                .name = "_map_write",
@@ -3067,6 +3670,22 @@ void vg_start(void)
                .function = console_credits
        });
 
+       vg_convar_push( (struct vg_convar){
+               .name = "colours",
+               .data = &colour_set_id,
+               .data_type = k_convar_dtype_i32,
+               .opt_i32 = { .min = 0, .max = 2, .clamp = 1 },
+               .persistent = 1
+       });
+
+   vg_convar_push( (struct vg_convar){
+      .name = "theme",
+      .data = &world_theme_id,
+      .data_type = k_convar_dtype_i32,
+      .opt_i32 = { .min = 0, .max = vg_list_size( world_themes )-1, .clamp = 1 },
+      .persistent = 1,
+   });
+
        // Combined quad, long quad / empty circle / filled circle mesh
        {
                float combined_mesh[6*6 + 32*6*3] = {
@@ -3108,19 +3727,6 @@ void vg_start(void)
                init_mesh( &world.shapes, combined_mesh, vg_list_size( combined_mesh ) );
        }
        
-       // Numbers mesh
-       {
-               init_mesh( &world.numbers,
-                       MESH_NUMBERS_BUFFER,
-                       vg_list_size( MESH_NUMBERS_BUFFER )
-               );
-               
-               for( int i = 0; i < 10; i ++ )
-               {
-                       vg_info( "offset: %u, length: %u\n", MESH_NUMBERS_OFFSETS[i][0], MESH_NUMBERS_OFFSETS[i][1] );
-               }
-       }
-       
        // Create wire mesh
        {
                int const num_segments = 64;
@@ -3194,7 +3800,12 @@ void vg_start(void)
        }
        
        resource_load_main();
-       
+
+   // Init world text
+   {
+      ui_init_context( &world.st.world_text, 15000 );
+   }
+
        // Restore gamestate
        career_local_data_init();
        career_load();
@@ -3202,7 +3813,6 @@ void vg_start(void)
 
 void vg_free(void)
 {
-       sw_free_opengl();
        console_save_map( 0, NULL );
        career_serialize();
 
@@ -3216,8 +3826,9 @@ void vg_free(void)
        glDeleteBuffers( 1, &world.wire.ebo );
 
        free_mesh( &world.shapes );
-       free_mesh( &world.numbers );
        
+   ui_context_free( &world.st.world_text );
+
        map_free();
 }