/**** 
* Classes
****/ 
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Define a class for the PianoTile
var PianoTile = Container.expand(function () {
	var self = Container.call(this);
	// Create and attach a black rectangle as the tile
	var tileGraphics = self.attachAsset('tile', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Set the speed of the tile
	self.speed = 5;
	// Update function to move the tile downwards
	self.update = function () {
		self.y += self.speed;
	};
	// Function to handle tap on the tile
	self.tap = function () {
		// Increase score and destroy the tile
		LK.setScore(LK.getScore() + 1);
		self.destroy();
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x4169e1 //Init game with black background 
});

/**** 
* Game Code
****/ 
// Initialize score display
var scoreTxt = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Array to keep track of active tiles
var tiles = [];
// Function to create a new tile
function createTile() {
	var newTile = new PianoTile();
	// Randomly position the tile in one of the two lanes
	newTile.x = Math.random() > 0.5 ? 512 : 1536;
	newTile.y = -100; // Start above the screen
	tiles.push(newTile);
	game.addChild(newTile);
}
// Game update function
game.update = function () {
	// Update score display
	scoreTxt.setText(LK.getScore());
	// Create a new tile every 60 ticks
	if (LK.ticks % 60 == 0) {
		createTile();
	}
	// Update and check each tile
	for (var i = tiles.length - 1; i >= 0; i--) {
		var tile = tiles[i];
		tile.update();
		// Check if tile is off-screen
		if (tile.y > 2732) {
			// End game if a tile is missed
			LK.showGameOver();
			return;
		}
	}
};
// Handle tap events
game.down = function (x, y, obj) {
	// Check if a tile was tapped
	for (var i = tiles.length - 1; i >= 0; i--) {
		var tile = tiles[i];
		if (tile.intersects({
			x: x,
			y: y,
			width: 1,
			height: 1
		})) {
			tile.tap();
			tiles.splice(i, 1);
			break;
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -28,9 +28,9 @@
 /**** 
 * Initialize Game
 ****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000 //Init game with black background 
+	backgroundColor: 0x4169e1 //Init game with black background 
 });
 
 /**** 
 * Game Code