Fix GameBoy VRAM shared memory overlap bug between background tiles and stamina UI sprites

src/engine.c

@@ -95,7 +95,8 @@ void engine_init(void) {
     set_sprite_data(player_TILE_COUNT, enemy_TILE_COUNT, enemy_tiles);
     set_sprite_data(player_TILE_COUNT + enemy_TILE_COUNT, gameover_TILE_COUNT, gameover_tiles);
     set_sprite_data(player_TILE_COUNT + enemy_TILE_COUNT + gameover_TILE_COUNT, victory_TILE_COUNT, victory_tiles);
-    set_sprite_data(player_TILE_COUNT + enemy_TILE_COUNT + gameover_TILE_COUNT + victory_TILE_COUNT, stamina_TILE_COUNT * 2, stamina_tiles);
+    // Load stamina_tiles AFTER the background tiles to prevent VRAM overlap in the shared block (indices > 127)
+    set_sprite_data(tiles_TILE_COUNT, stamina_TILE_COUNT * 2, stamina_tiles);
 
     // SPAWN DEL GIOCATORE
     player_lx = 1;

src/render.c

@@ -57,7 +57,8 @@ void update_stamina_display(void) {
     uint8_t num_pixels = temp / 100;
     
     // Offset di base nella VRAM dove sono caricati i tile della stamina
-    uint8_t base_tile = player_TILE_COUNT + enemy_TILE_COUNT + gameover_TILE_COUNT + victory_TILE_COUNT; // 44
+    // Caricato a partire da tiles_TILE_COUNT per non sovrascrivere la VRAM condivisa (>=128)
+    uint8_t base_tile = tiles_TILE_COUNT;
     
     for (uint8_t i = 0; i < 5; i++) {
         uint8_t tile_idx;