var Coin = Container.expand(function (bonusArea) {
	var self = Container.call(this);
	var coinGraphics = self.createAsset('coin', 'Coin Graphics', 0.5, 0.5);
	self.addChild(coinGraphics);
	self.placeRandomly = function () {
		var minX = bonusArea.x - bonusArea.width / 2 + coinGraphics.width / 2;
		var maxX = bonusArea.x + bonusArea.width / 2 - coinGraphics.width / 2;
		var minY = bonusArea.y - bonusArea.height / 2 + coinGraphics.height / 2;
		var maxY = bonusArea.y + bonusArea.height / 2 - coinGraphics.height / 2;
		self.x = Math.random() * (maxX - minX) + minX;
		self.y = Math.random() * (maxY - minY) + minY;
	};
	self.placeRandomly();
});
var BonusArea = Container.expand(function () {
	var self = Container.call(this);
	var bonusAreaGraphics = self.createAsset('bonusArea', 'Bonus Area Graphics', 0.5, 0.5);
	self.addChild(bonusAreaGraphics);
	self.x = 2048 / 2;
	self.y = 2732 / 2;
});
var ArenaCircle = Container.expand(function () {
	var self = Container.call(this);
	self.radius = 2048 * 0.4;
	var circleGraphics = self.createAsset('arenaCircle', 'Arena Circle Graphics', 0.5, 0.5);
	var orbitLine = self.createAsset('orbitLine', 'Orbit Line Graphics', 0.5, 0.5);
	circleGraphics.width = self.radius * 2;
	circleGraphics.height = self.radius * 2;
	orbitLine.width = self.radius * 2;
	orbitLine.height = 10;
	orbitLine.alpha = 0;
	self.addChild(circleGraphics);
	self.addChild(orbitLine);
	self.x = 2048 / 2;
	self.y = 2732 / 2;
});
var Ball = Container.expand(function (arenaRadius, paddle, game) {
	var self = Container.call(this);
	Ball.prototype.animateScoreText = function () {
		var originalScale = this.game.scoreTxt.scale.x;
		var targetScale = originalScale * 1.25;
		var expandDuration = 50;
		var contractDuration = 100;
		LK.setTimeout((function () {
			this.game.scoreTxt.scale.set(targetScale);
		}).bind(this), expandDuration);
		LK.setTimeout((function () {
			this.game.scoreTxt.scale.set(originalScale);
		}).bind(this), expandDuration + contractDuration);
	};
	self.game = game;
	Ball.prototype.intersectsBounds = function (boundsA, boundsB) {
		return boundsA.x < boundsB.x + boundsB.width && boundsA.x + boundsA.width > boundsB.x && boundsA.y < boundsB.y + boundsB.height && boundsA.y + boundsA.height > boundsB.y;
	};
	self.paddle = paddle;
	Ball.prototype.isCollidingWithArenaEdge = function (arenaCircle) {
		var dx = this.x - 2048 / 2;
		var dy = this.y - 2732 / 2;
		var distance = Math.sqrt(dx * dx + dy * dy);
		return distance + this.width / 2 > arenaCircle.radius;
	};
	var ballGraphics = self.createAsset('ball', 'Ball Graphics', 0.5, 0.5);
	var angleToPaddle = Math.atan2(100 - 2732 / 2, 2048 / 2 - 2048 / 2);
	self.velocity = {
		x: 5 * Math.cos(angleToPaddle),
		y: 5 * Math.sin(angleToPaddle)
	};
	self.radius = arenaRadius;
	self.move = function (arenaCircle) {
		this.applyVelocity();
		if (this.isCollidingWithPaddle(this.paddle)) {
			this.bounceOffPaddle(this.paddle);
		} else if (this.isCollidingWithArenaEdge(arenaCircle)) {
			LK.showGameOver();
			this.reset();
		}
		this.x += this.velocity.x;
		this.y += this.velocity.y;
		this.game.collectCoin(this);
	};
	Ball.prototype.applyVelocity = function () {
		var dx = this.x - 2048 / 2;
		var dy = this.y - 2732 / 2;
		var angle = Math.atan2(dy, dx);
		var speed = Math.sqrt(this.velocity.x * this.velocity.x + this.velocity.y * this.velocity.y) * 1.005;
		angle += this.velocity.angleChange;
		LK.setTimeout((function () {
			this.x = 2048 / 2 + Math.cos(angle) * this.radius;
			this.y = 2732 / 2 + Math.sin(angle) * this.radius;
		}).bind(this), 1000);
	};
	Ball.prototype.checkArenaCollision = function (paddle, arenaCircle) {
		if (this.isCollidingWithArenaEdge(arenaCircle)) {
			this.bounceOffArenaEdge(paddle.angle, paddle.speed);
		} else if (this.isCollidingWithPaddle(paddle)) {
			this.bounceOffPaddle(paddle);
		}
	};
	Ball.prototype.isCollidingWithPaddle = function (paddle) {
		if (paddle) {
			if (paddle) {
				var paddleCenter = {
					x: paddle.x,
					y: paddle.y
				};
				var ballCenter = {
					x: this.x,
					y: this.y
				};
				var dx = paddleCenter.x - ballCenter.x;
				var dy = paddleCenter.y - ballCenter.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				return distance < paddle.width / 2 + this.width / 2;
			}
		}
		return false;
	};
	Ball.prototype.bounceOffPaddle = function (paddle) {
		var angleToPaddleCenter = Math.atan2(paddle.y - this.y, paddle.x - this.x);
		var speed = Math.sqrt(this.velocity.x * this.velocity.x + this.velocity.y * this.velocity.y) * 1.015;
		this.velocity.x = speed * Math.cos(angleToPaddleCenter + Math.PI);
		this.velocity.y = speed * Math.sin(angleToPaddleCenter + Math.PI);
		if (!this.hasScored) {
			this.game.score += 1;
			this.game.scoreTxt.setText(this.game.score.toString());
			this.animateScoreText();
			if (this.game.score % 5 === 0) {
				this.game.animateWowScore();
			}
			this.hasScored = true;
			if (!this.speedIncreased) {
				self.paddle.speed *= 1.015;
				this.speedIncreased = true;
				LK.setTimeout(function () {
					self.speedIncreased = false;
				}, 500);
			} else {
				self.paddle.speed *= 1.015;
			}
		}
		LK.setTimeout(function () {
			self.hasScored = false;
		}, 500);
	};
	self.reset = function () {
		self.x = 2048 / 2;
		self.y = 2732 / 2;
		var initialAngle = self.paddle.angle;
		self.velocity = {
			x: 5 * Math.cos(initialAngle),
			y: 5 * Math.sin(initialAngle)
		};
	};
});
var Paddle = Container.expand(function (arenaRadius) {
	var self = Container.call(this);
	var paddleGraphics = self.createAsset('paddle', 'Paddle Graphics', 0.5, 0.5);
	self.addChild(paddleGraphics);
	self.angle = Math.random() * 2 * Math.PI;
	self.radius = arenaRadius + 20;
	self.speed = 0.025;
	self.move = function () {
		this.updatePosition();
	};
	Paddle.prototype.updatePosition = function () {
		self.angle += self.speed;
		var cosAngle = Math.cos(self.angle);
		var sinAngle = Math.sin(self.angle);
		self.x = self.radius * cosAngle + 2048 / 2;
		self.y = self.radius * sinAngle + 2732 / 2;
		paddleGraphics.rotation = self.angle + Math.PI / 2 + Math.PI / 2 - Math.PI / 9 - Math.PI / 18;
	};
	self.reverseDirection = function () {
		self.speed *= -1;
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	self.score = 0;
	self.scoreTxt = new Text2(self.score.toString(), {
		size: 227.8125 * 0.9,
		fill: "#ffffff",
		stroke: "#075079",
		strokeThickness: 11.25,
		font: "'Luckiest Guy', 'Arial Black', sans-serif"
	});
	self.scoreTxt.anchor.set(0.5, 0.5);
	self.scoreTxt.x = 2048 / 2;
	self.scoreTxt.y = 2732 / 2 + 5;
	var bonusArea = self.addChild(new BonusArea());
	var coin = self.addChild(new Coin(bonusArea));
	self.collectCoin = function (ball) {
		if (ball.intersects(coin)) {
			coin.placeRandomly();
			self.score += 10;
			self.scoreTxt.setText(self.score.toString());
			ball.animateScoreText();
		}
	};
	self.scoreTxt.anchor.set(0.5, 0.5);
	self.scoreTxt.x = 2048 / 2;
	var arenaCircle = self.addChild(new ArenaCircle());
	self.scoreTxt.y = 2732 / 2 + 5;
	LK.stageContainer.setBackgroundColor(0xFFFFFF);
	var background = self.createAsset('background', 'Background Graphics', 0.5, 0.5);
	background.width = 2048;
	background.height = 2732;
	background.x = 2048 / 2;
	background.y = 2732 / 2;
	self.addChildAt(background, 0);
	var bonusArea = self.addChild(new BonusArea());
	self.wowScore = self.createAsset('wowScore', 'WOW Score Graphics', 0.5, 0.5);
	self.wowScore.y = 3000;
	self.wowScore.x = 2048 / 2;
	var paddle = self.addChild(new Paddle(arenaCircle.radius));
	paddle.x = 2048 / 2;
	paddle.y = 100;
	self.addChild(self.scoreTxt);
	var ball = self.addChild(new Ball(arenaCircle.radius, paddle, self));
	ball.reset();
	self.addChild(coin);
	var isGameOver = false;
	LK.on('tick', function () {
		paddle.move();
		ball.move(arenaCircle);
	});
	self.animateWowScore = function () {
		var slideUp = LK.setInterval(function () {
			self.wowScore.y -= 100;
			if (self.wowScore.y <= 3000 / 1.25) {
				LK.clearInterval(slideUp);
				LK.setTimeout(function () {
					var slideDown = LK.setInterval(function () {
						self.wowScore.y += 100;
						if (self.wowScore.y >= 3000) {
							LK.clearInterval(slideDown);
						}
					}, 1000 / 900);
				}, 1500);
			}
		}, 1000 / 900);
	};
	stage.on('down', function (obj) {
		paddle.reverseDirection();
	});
});

===================================================================
--- original.js
+++ change.js
@@ -188,9 +188,8 @@
 	self.scoreTxt.x = 2048 / 2;
 	self.scoreTxt.y = 2732 / 2 + 5;
 	var bonusArea = self.addChild(new BonusArea());
 	var coin = self.addChild(new Coin(bonusArea));
-	self.addChildAt(coin, self.children.length);
 	self.collectCoin = function (ball) {
 		if (ball.intersects(coin)) {
 			coin.placeRandomly();
 			self.score += 10;
@@ -218,8 +217,9 @@
 	paddle.y = 100;
 	self.addChild(self.scoreTxt);
 	var ball = self.addChild(new Ball(arenaCircle.radius, paddle, self));
 	ball.reset();
+	self.addChild(coin);
 	var isGameOver = false;
 	LK.on('tick', function () {
 		paddle.move();
 		ball.move(arenaCircle);