/**** 
* Classes
****/ 
//<Assets used in the game will automatically appear here>
// Bird class
var Bird = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.gravity = 0.3;
	self.lift = -15;
	self.velocity = 0;
	self.flap = function () {
		self.velocity = self.lift;
	};
	self.update = function () {
		self.velocity += self.gravity;
		self.y += self.velocity;
		if (self.y > 2732) {
			self.y = 2732;
			self.velocity = 0;
			LK.showGameOver();
		}
		if (self.y < 0) {
			self.y = 0;
			self.velocity = 0;
		}
		// Add fire particle effect
		var fireParticle = new FireParticle();
		fireParticle.x = self.x - 50;
		fireParticle.y = self.y;
		game.addChild(fireParticle);
	};
	return self;
});
// Coin class
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coinGraphics = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -8;
	self.update = function () {
		self.x += self.speed;
		if (self.x < -coinGraphics.width) {
			self.destroy();
		}
	};
	return self;
});
// FireParticle class
var FireParticle = Container.expand(function () {
	var self = Container.call(this);
	var fireGraphics = self.attachAsset('fireParticle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -5;
	self.update = function () {
		self.x += self.speed;
		self.alpha -= 0.02;
		if (self.alpha <= 0) {
			self.destroy();
		}
	};
	return self;
});
// Pipe class
var Pipe = Container.expand(function () {
	var self = Container.call(this);
	var pipeGraphics = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -8;
	self.update = function () {
		self.x += self.speed;
		if (self.x < -pipeGraphics.width) {
			self.destroy();
		}
	};
	return self;
});

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

/**** 
* Game Code
****/ 
var background = LK.getAsset('Bg', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 2732 / 2,
	width: 2048,
	height: 2732
});
game.addChild(background);
var bird = game.addChild(new Bird());
bird.x = 2048 / 4;
bird.y = 2732 / 2;
var pipes = [];
var coins = [];
var score = 0;
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
function spawnPipe() {
	var gap = 400;
	var topPipeHeight = Math.random() * (2732 - gap);
	var bottomPipeHeight = 2732 - topPipeHeight - gap;
	var topPipe = new Pipe();
	topPipe.x = 2048;
	topPipe.y = topPipeHeight / 2;
	pipes.push(topPipe);
	game.addChild(topPipe);
	var bottomPipe = new Pipe();
	bottomPipe.x = 2048;
	bottomPipe.y = 2732 - bottomPipeHeight / 2;
	pipes.push(bottomPipe);
	game.addChild(bottomPipe);
}
function spawnCoin() {
	var coin = new Coin();
	coin.x = 2048;
	coin.y = Math.random() * 2732;
	coins.push(coin);
	game.addChild(coin);
}
game.down = function (x, y, obj) {
	bird.flap();
};
game.update = function () {
	bird.update();
	for (var i = pipes.length - 1; i >= 0; i--) {
		pipes[i].update();
		if (pipes[i].intersects(bird)) {
			LK.showGameOver();
			for (var k = game.children.length - 1; k >= 0; k--) {
				if (game.children[k] instanceof FireParticle) {
					game.children[k].update();
				}
			}
		}
		if (pipes[i].x < -pipes[i].width) {
			pipes[i].destroy();
			pipes.splice(i, 1);
		}
	}
	for (var j = coins.length - 1; j >= 0; j--) {
		coins[j].update();
		if (coins[j].intersects(bird)) {
			score += 1;
			scoreTxt.setText(score);
			coins[j].destroy();
			coins.splice(j, 1);
		}
		if (coins[j].x < -coins[j].width) {
			coins[j].destroy();
			coins.splice(j, 1);
		}
	}
	if (LK.ticks % 60 == 0) {
		spawnPipe();
	}
	if (LK.ticks % 150 == 0) {
		spawnCoin();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -146,16 +146,18 @@
 	for (var i = pipes.length - 1; i >= 0; i--) {
 		pipes[i].update();
 		if (pipes[i].intersects(bird)) {
 			LK.showGameOver();
-			// Update fire particles
 			for (var k = game.children.length - 1; k >= 0; k--) {
 				if (game.children[k] instanceof FireParticle) {
 					game.children[k].update();
 				}
 			}
 		}
-		;
+		if (pipes[i].x < -pipes[i].width) {
+			pipes[i].destroy();
+			pipes.splice(i, 1);
+		}
 	}
 	for (var j = coins.length - 1; j >= 0; j--) {
 		coins[j].update();
 		if (coins[j].intersects(bird)) {
@@ -163,8 +165,12 @@
 			scoreTxt.setText(score);
 			coins[j].destroy();
 			coins.splice(j, 1);
 		}
+		if (coins[j].x < -coins[j].width) {
+			coins[j].destroy();
+			coins.splice(j, 1);
+		}
 	}
 	if (LK.ticks % 60 == 0) {
 		spawnPipe();
 	}