/**** 
* Classes
****/ 
//<Assets used in the game will automatically appear here>
// Ball class
var Ball = Container.expand(function () {
	var self = Container.call(this);
	var ballGraphics = self.attachAsset('ball', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = 5;
	self.speedY = 5;
	self.update = function () {
		self.x += self.speedX;
		self.y += self.speedY;
		if (self.x <= 0 || self.x >= 2048) {
			self.speedX *= -1;
		}
		if (self.y <= 0 || self.y >= 2732) {
			self.speedY *= -1;
		}
	};
});
// Paddle class
var Paddle = Container.expand(function () {
	var self = Container.call(this);
	var paddleGraphics = self.attachAsset('paddle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		// Paddle movement logic will be handled in the game move event
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000 //Init game with black background
});

/**** 
* Game Code
****/ 
var background = game.attachAsset('background', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 1366
});
var ball = new Ball();
ball.x = 1024;
ball.y = 1366;
game.addChild(ball);
var playerPaddle = new Paddle();
playerPaddle.x = 1024;
playerPaddle.y = 2500;
game.addChild(playerPaddle);
var aiPaddle = new Paddle();
aiPaddle.x = 1024;
aiPaddle.y = 200;
game.addChild(aiPaddle);
var scoreTxt = new Text2('0 - 0', {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var playerScore = 0;
var aiScore = 0;
function updateScore() {
	scoreTxt.setText("".concat(playerScore, " - ").concat(aiScore));
}
game.move = function (x, y, obj) {
	playerPaddle.x = x;
};
game.update = function () {
	ball.update();
	playerPaddle.update();
	aiPaddle.update();
	// AI paddle movement
	if (ball.x > aiPaddle.x) {
		aiPaddle.x += 5;
	} else {
		aiPaddle.x -= 5;
	}
	// Ball collision with paddles
	if (ball.intersects(playerPaddle) || ball.intersects(aiPaddle)) {
		ball.speedY *= -1;
		// Play MusicBG1 when tennis ball hits the racket
		LK.getSound('MusicBG1').play();
	}
	// Scoring
	if (ball.y <= 0) {
		playerScore++;
		updateScore();
		ball.x = 1024;
		ball.y = 1366;
	} else if (ball.y >= 2732) {
		aiScore++;
		updateScore();
		ball.x = 1024;
		ball.y = 1366;
	}
};

===================================================================
--- original.js
+++ change.js
@@ -70,9 +70,9 @@
 LK.gui.top.addChild(scoreTxt);
 var playerScore = 0;
 var aiScore = 0;
 function updateScore() {
-	scoreTxt.setText(playerScore + ' - ' + aiScore);
+	scoreTxt.setText("".concat(playerScore, " - ").concat(aiScore));
 }
 game.move = function (x, y, obj) {
 	playerPaddle.x = x;
 };