/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1");

/**** 
* Classes
****/ 
var AIPaddle = Container.expand(function () {
	var self = Container.call(this);
	var paddleGraphics = self.attachAsset('aiPaddle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.targetX = 1024;
	self.baseSpeed = 4;
	self.update = function () {
		// AI follows ball with increasing difficulty
		var difficulty = Math.min(1 + (playerScore + aiScore) * 0.1, 3);
		var speed = self.baseSpeed * difficulty;
		if (ball.velocityY < 0) {
			self.targetX = ball.x + ball.velocityX * 30;
		} else {
			self.targetX = 1024;
		}
		self.targetX = Math.max(374, Math.min(1674, self.targetX));
		if (Math.abs(self.x - self.targetX) > speed) {
			if (self.x < self.targetX) {
				self.x += speed;
			} else {
				self.x -= speed;
			}
		} else {
			self.x = self.targetX;
		}
	};
	return self;
});
var Ball = Container.expand(function () {
	var self = Container.call(this);
	var ballGraphics = self.attachAsset('ball', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityX = 0;
	self.velocityY = 0;
	self.speed = 8;
	self.lastPlayerHit = false;
	self.lastAIHit = false;
	self.lastTableHit = false;
	self.reset = function () {
		self.x = 1024;
		self.y = 1366;
		self.velocityX = Math.random() > 0.5 ? self.speed : -self.speed;
		self.velocityY = Math.random() > 0.5 ? self.speed * 0.7 : -self.speed * 0.7;
		self.lastPlayerHit = false;
		self.lastAIHit = false;
		self.lastTableHit = false;
	};
	self.update = function () {
		self.x += self.velocityX;
		self.y += self.velocityY;
		// Ball vs table bounds
		if (self.x <= 224 || self.x >= 1824) {
			self.velocityX = -self.velocityX;
		}
		// Ball vs player paddle collision
		var currentPlayerHit = self.intersects(playerPaddle);
		if (!self.lastPlayerHit && currentPlayerHit) {
			self.velocityY = -Math.abs(self.velocityY);
			self.velocityX += (self.x - playerPaddle.x) * 0.1;
			LK.getSound('paddleHit').play();
		}
		self.lastPlayerHit = currentPlayerHit;
		// Ball vs AI paddle collision
		var currentAIHit = self.intersects(aiPaddle);
		if (!self.lastAIHit && currentAIHit) {
			self.velocityY = Math.abs(self.velocityY);
			self.velocityX += (self.x - aiPaddle.x) * 0.1;
			LK.getSound('paddleHit').play();
		}
		self.lastAIHit = currentAIHit;
		// Ball vs table collision (sound effect)
		var onTable = self.x > 224 && self.x < 1824 && self.y > 866 && self.y < 1866;
		if (!self.lastTableHit && onTable) {
			LK.getSound('tableHit').play();
		}
		self.lastTableHit = onTable;
		// Scoring
		if (self.y < 800 && !ballScored) {
			playerScore++;
			ballScored = true;
			LK.getSound('score').play();
			LK.setScore(playerScore);
			updateScore();
			checkWin();
		} else if (self.y > 1932 && !ballScored) {
			aiScore++;
			ballScored = true;
			LK.getSound('score').play();
			updateScore();
			checkWin();
		}
	};
	return self;
});
var PlayerPaddle = Container.expand(function () {
	var self = Container.call(this);
	var paddleGraphics = self.attachAsset('playerPaddle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a1a
});

/**** 
* Game Code
****/ 
var playerScore = 0;
var aiScore = 0;
var ballScored = false;
var gameEnded = false;
var playerLevel = storage.playerLevel || 1;
// Create table
var table = game.addChild(LK.getAsset('table', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 1366
}));
// Create net
var net = game.addChild(LK.getAsset('net', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 1366
}));
// Create center line
var centerLine = game.addChild(LK.getAsset('centerLine', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 1366
}));
// Create paddles
var playerPaddle = game.addChild(new PlayerPaddle());
playerPaddle.x = 1024;
playerPaddle.y = 1800;
var aiPaddle = game.addChild(new AIPaddle());
aiPaddle.x = 1024;
aiPaddle.y = 932;
// Create ball
var ball = game.addChild(new Ball());
ball.reset();
// Create score display
var scoreText = new Text2('Player: 0 - AI: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
// Create level display
var levelText = new Text2('Level: ' + playerLevel, {
	size: 60,
	fill: 0xFFD700
});
levelText.anchor.set(0.5, 0);
levelText.y = 90;
LK.gui.top.addChild(levelText);
function updateScore() {
	scoreText.setText('Player: ' + playerScore + ' - AI: ' + aiScore);
	levelText.setText('Level: ' + playerLevel);
}
function checkWin() {
	if (playerScore >= 10 && !gameEnded) {
		gameEnded = true;
		playerLevel++;
		storage.playerLevel = playerLevel;
		LK.showYouWin();
	} else if (aiScore >= 10 && !gameEnded) {
		gameEnded = true;
		playerLevel = 1;
		storage.playerLevel = playerLevel;
		LK.showGameOver();
	} else {
		// Reset ball for next point
		LK.setTimeout(function () {
			ball.reset();
			ballScored = false;
		}, 1000);
	}
}
// Touch controls for player paddle
var isDragging = false;
game.down = function (x, y, obj) {
	isDragging = true;
	playerPaddle.x = Math.max(374, Math.min(1674, x));
};
game.move = function (x, y, obj) {
	if (isDragging) {
		playerPaddle.x = Math.max(374, Math.min(1674, x));
	}
};
game.up = function (x, y, obj) {
	isDragging = false;
};
// Start background music
LK.playMusic('bgMusic');
game.update = function () {
	if (!gameEnded) {
		// Ball goes off screen, reset it
		if (ball.y < 700 || ball.y > 2032) {
			if (!ballScored) {
				if (ball.y < 700) {
					playerScore++;
					LK.setScore(playerScore);
				} else {
					aiScore++;
				}
				ballScored = true;
				LK.getSound('score').play();
				updateScore();
				checkWin();
			}
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -211,8 +211,10 @@
 };
 game.up = function (x, y, obj) {
 	isDragging = false;
 };
+// Start background music
+LK.playMusic('bgMusic');
 game.update = function () {
 	if (!gameEnded) {
 		// Ball goes off screen, reset it
 		if (ball.y < 700 || ball.y > 2032) {