/**** 
* Classes
****/ 
//<Assets used in the game will automatically appear here>
// Define the FlappyBird class
var FlappyBird = 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 = -10;
	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;
	};
});
// Define the Wall class
var Wall = Container.expand(function () {
	var self = Container.call(this);
	var wallGraphics = self.attachAsset('wall', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -6;
	self.update = function () {
		self.x += self.speed;
		if (self.x < -wallGraphics.width / 2) {
			self.destroy();
		}
	};
});

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

/**** 
* Game Code
****/ 
var bird = game.addChild(new FlappyBird());
bird.x = 2048 / 4;
bird.y = 2732 / 2;
var walls = [];
var score = 0;
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
function spawnWall() {
	var gapHeight = 400;
	var gapPosition = Math.random() * (2732 - gapHeight) + gapHeight / 2;
	var topWall = new Wall();
	topWall.x = 2048 + 100;
	topWall.y = gapPosition - gapHeight / 2 - topWall.height / 2;
	walls.push(topWall);
	game.addChild(topWall);
	var bottomWall = new Wall();
	bottomWall.x = 2048 + 100;
	bottomWall.y = gapPosition + gapHeight / 2 + bottomWall.height / 2;
	walls.push(bottomWall);
	game.addChild(bottomWall);
}
game.down = function (x, y, obj) {
	bird.flap();
};
game.update = function () {
	bird.update();
	for (var i = walls.length - 1; i >= 0; i--) {
		walls[i].update();
		if (walls[i].intersects(bird)) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
		if (walls[i].x < bird.x && !walls[i].scored) {
			score++;
			scoreTxt.setText(score);
			walls[i].scored = true;
		}
	}
	if (LK.ticks % 90 == 0) {
		spawnWall();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -34,9 +34,9 @@
 	var wallGraphics = self.attachAsset('wall', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
-	self.speed = -3;
+	self.speed = -6;
 	self.update = function () {
 		self.x += self.speed;
 		if (self.x < -wallGraphics.width / 2) {
 			self.destroy();