/**** 
* 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.velocity = 0;
	self.gravity = 0.5;
	self.flapStrength = -15;
	self.update = function () {
		self.velocity += self.gravity;
		self.y += self.velocity;
		if (self.y > 2732 - birdGraphics.height / 2) {
			self.y = 2732 - birdGraphics.height / 2;
			self.velocity = 0;
		}
		if (self.y < birdGraphics.height / 2) {
			self.y = birdGraphics.height / 2;
			self.velocity = 0;
		}
	};
	self.flap = function () {
		self.velocity = self.flapStrength;
	};
});
// 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 = -5;
	self.update = function () {
		self.x += self.speed;
		if (self.x < -pipeGraphics.width / 2) {
			self.destroy();
		}
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB // Init game with sky blue background
});

/**** 
* Game Code
****/ 
var sky = LK.getAsset('sky', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 2732 / 2
});
game.addChild(sky);
var cloud = LK.getAsset('cloud', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 2732 / 4
});
game.addChild(cloud);
var bird = game.addChild(new Bird());
bird.x = 2048 / 4;
bird.y = 2732 / 2;
var pipes = [];
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 pipeHeight = 30;
	var pipeY = Math.random() * (2732 - gap - pipeHeight) + pipeHeight / 2;
	var topPipe = new Pipe();
	topPipe.x = 2048 + topPipe.width / 2;
	topPipe.y = pipeY - gap / 2 - pipeHeight;
	pipes.push(topPipe);
	game.addChild(topPipe);
	var bottomPipe = new Pipe();
	bottomPipe.x = 2048 + bottomPipe.width / 2;
	bottomPipe.y = pipeY + gap / 2 + pipeHeight;
	pipes.push(bottomPipe);
	game.addChild(bottomPipe);
}
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.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
		if (pipes[i].x < bird.x && !pipes[i].scored) {
			score++;
			pipes[i].scored = true;
			scoreTxt.setText(score);
		}
	}
	if (LK.ticks % 90 == 0) {
		spawnPipe();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -10,9 +10,9 @@
 		anchorY: 0.5
 	});
 	self.velocity = 0;
 	self.gravity = 0.5;
-	self.flapStrength = -10;
+	self.flapStrength = -15;
 	self.update = function () {
 		self.velocity += self.gravity;
 		self.y += self.velocity;
 		if (self.y > 2732 - birdGraphics.height / 2) {