/**** 
* Initialize Game
****/ 
/**** Initialize Game ****/
var game = new LK.Game({
	backgroundColor: 0x70c5ce
});

/**** 
* Game Code
****/ 
/**** Assets ****/
var bg = LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
});
game.addChild(bg);
var ground = LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 2532
});
game.addChild(ground);
var groundDirt = LK.getAsset('groundDirt', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 2532 + 140
});
game.addChild(groundDirt);
/**** Bird ****/
var bird = new Container();
bird.attachAsset('bird', {
	anchorX: 0.5,
	anchorY: 0.5
});
bird.x = 400;
bird.y = 800;
game.addChild(bird);
var velocity = 0;
var gravity = 0.8;
var jump = -15;
var maxFall = 20;
/**** Pipes ****/
var pipes = [];
var pipeGap = 400;
var pipeSpeed = 10;
/**** Score ****/
var score = 0;
var scoreTxt = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF,
	shadow: {
		color: 0x222222,
		blur: 8,
		x: 0,
		y: 4
	},
	font: "'Comic Sans MS', 'Comic Sans', 'Arial Black', Impact, Tahoma"
});
scoreTxt.anchor.set(0.5, 0);
scoreTxt.x = 1024;
scoreTxt.y = 50;
LK.gui.top.addChild(scoreTxt);
/**** Buttons ****/
var startButton = LK.getAsset('startButton', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 1200
});
startButton.visible = false;
LK.gui.center.addChild(startButton);
var restartButton = LK.getAsset('restartButton', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 1500
});
restartButton.visible = false;
LK.gui.center.addChild(restartButton);
/**** Spawn Pipes ****/
function spawnPipes() {
	var gapY = 500 + Math.random() * 1000;
	var topPipe = new Container();
	topPipe.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 1
	});
	topPipe.x = 2200;
	topPipe.y = gapY - pipeGap / 2;
	var bottomPipe = new Container();
	bottomPipe.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 0
	});
	bottomPipe.x = 2200;
	bottomPipe.y = gapY + pipeGap / 2;
	topPipe.passed = false;
	game.addChild(topPipe);
	game.addChild(bottomPipe);
	pipes.push({
		top: topPipe,
		bottom: bottomPipe
	});
}
/**** Collision ****/
function hitTest(a, b) {
	return a.x + 40 > b.x - 80 && a.x - 40 < b.x + 80 && a.y + 40 > b.y - 400 && a.y - 40 < b.y + 400;
}
/**** Controls (Mouse + Touch) ****/
function jumpBird() {
	velocity = jump;
}
game.down = function () {
	jumpBird();
};
/**** Game Loop ****/
var frame = 0;
game.update = function () {
	velocity += gravity;
	if (velocity > maxFall) velocity = maxFall;
	bird.y += velocity;
	bird.rotation = velocity * 0.05;
	if (bird.y > 2600 || bird.y < 0) {
		LK.getSound('hit').play();
		LK.showGameOver();
		return;
	}
	frame++;
	if (frame % 90 === 0) spawnPipes();
	if (score > 5) pipeSpeed = 12;
	if (score > 10) pipeSpeed = 14;
	if (score > 20) pipeSpeed = 16;
	for (var i = pipes.length - 1; i >= 0; i--) {
		var p = pipes[i];
		p.top.x -= pipeSpeed;
		p.bottom.x -= pipeSpeed;
		if (!p.top.passed && p.top.x < bird.x) {
			p.top.passed = true;
			score++;
			scoreTxt.setText(score);
			LK.getSound('score').play();
		}
		if (hitTest(bird, p.top) || hitTest(bird, p.bottom)) {
			LK.getSound('hit').play();
			LK.showGameOver();
			return;
		}
		if (p.top.x < -200) {
			p.top.destroy();
			p.bottom.destroy();
			pipes.splice(i, 1);
		}
	}
};
/**** Restart ****/
LK.on('gameover', function () {
	setTimeout(function () {
		location.reload();
	}, 500);
});

===================================================================
--- original.js
+++ change.js
@@ -1,31 +1,30 @@
 /**** 
 * Initialize Game
 ****/ 
+/**** Initialize Game ****/
 var game = new LK.Game({
 	backgroundColor: 0x70c5ce
 });
 
 /**** 
 * Game Code
 ****/ 
-// Background
+/**** Assets ****/
 var bg = LK.getAsset('background', {
 	anchorX: 0,
 	anchorY: 0,
 	x: 0,
 	y: 0
 });
 game.addChild(bg);
-// Ground (grass)
 var ground = LK.getAsset('ground', {
 	anchorX: 0,
 	anchorY: 0,
 	x: 0,
 	y: 2532
 });
 game.addChild(ground);
-// Ground (dirt)
 var groundDirt = LK.getAsset('groundDirt', {
 	anchorX: 0,
 	anchorY: 0,
 	x: 0,
@@ -65,18 +64,17 @@
 scoreTxt.anchor.set(0.5, 0);
 scoreTxt.x = 1024;
 scoreTxt.y = 50;
 LK.gui.top.addChild(scoreTxt);
-// Start Button
+/**** Buttons ****/
 var startButton = LK.getAsset('startButton', {
 	anchorX: 0.5,
 	anchorY: 0.5,
 	x: 1024,
 	y: 1200
 });
 startButton.visible = false;
 LK.gui.center.addChild(startButton);
-// Restart Button
 var restartButton = LK.getAsset('restartButton', {
 	anchorX: 0.5,
 	anchorY: 0.5,
 	x: 1024,
@@ -112,53 +110,47 @@
 /**** Collision ****/
 function hitTest(a, b) {
 	return a.x + 40 > b.x - 80 && a.x - 40 < b.x + 80 && a.y + 40 > b.y - 400 && a.y - 40 < b.y + 400;
 }
-/**** Controls ****/
-LK.on('tap', function () {
-	velocity = jump; // jump immediately on tap
-});
+/**** Controls (Mouse + Touch) ****/
+function jumpBird() {
+	velocity = jump;
+}
+game.down = function () {
+	jumpBird();
+};
 /**** Game Loop ****/
 var frame = 0;
 game.update = function () {
-	// Gravity
 	velocity += gravity;
 	if (velocity > maxFall) velocity = maxFall;
 	bird.y += velocity;
-	// Bird rotation
 	bird.rotation = velocity * 0.05;
-	// Ground / ceiling collision
 	if (bird.y > 2600 || bird.y < 0) {
 		LK.getSound('hit').play();
 		LK.showGameOver();
 		return;
 	}
-	// Spawn pipes
 	frame++;
 	if (frame % 90 === 0) spawnPipes();
-	// Increase difficulty
 	if (score > 5) pipeSpeed = 12;
 	if (score > 10) pipeSpeed = 14;
 	if (score > 20) pipeSpeed = 16;
-	// Move pipes
 	for (var i = pipes.length - 1; i >= 0; i--) {
 		var p = pipes[i];
 		p.top.x -= pipeSpeed;
 		p.bottom.x -= pipeSpeed;
-		// Score
 		if (!p.top.passed && p.top.x < bird.x) {
 			p.top.passed = true;
 			score++;
 			scoreTxt.setText(score);
 			LK.getSound('score').play();
 		}
-		// Collision
 		if (hitTest(bird, p.top) || hitTest(bird, p.bottom)) {
 			LK.getSound('hit').play();
 			LK.showGameOver();
 			return;
 		}
-		// Remove off-screen pipes
 		if (p.top.x < -200) {
 			p.top.destroy();
 			p.bottom.destroy();
 			pipes.splice(i, 1);