Performance improvements

main.c

@@ -73,7 +73,7 @@ int main()
 		if (isKeyPressed(KEY_NSPIRE_LEFT)) x-=2;
 		if (isKeyPressed(KEY_NSPIRE_RIGHT)) x+=2;
 		map_draw(x, y, map);
-		updateScreen();
+		bufferSwap();
 	}
 
 	deinitBuffering();

map.c

@@ -32,9 +32,6 @@ void map_draw(unsigned x, unsigned y, const Map map)
 			sprite.x = map.layer0[tile_offset] * 24;
 			drawSpritePart(tiles, offset_x, offset_y, &sprite);
 
-			sprite.x = map.layer1[tile_offset] * 24;
-			drawSpritePart(tiles, offset_x, offset_y, &sprite);
-
 			tile_offset++;
 			offset_x += 24;
 		}