/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var Airplane = Container.expand(function () {
	var self = Container.call(this);
	var airplaneGraphics = self.attachAsset('airplane', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityY = 0;
	self.gravity = 0.5;
	self.jumpPower = -12;
	self.speed = 4;
	self.lastY = 0;
	self.lastIntersecting1 = false;
	self.lastIntersecting2 = false;
	self.jump = function () {
		self.velocityY = self.jumpPower;
		LK.getSound('engine').play();
	};
	self.update = function () {
		self.lastY = self.y;
		// Apply gravity
		self.velocityY += self.gravity;
		self.y += self.velocityY;
		// Move forward
		self.x += self.speed;
		// Keep airplane within bounds
		if (self.y < 50) {
			self.y = 50;
			self.velocityY = 0;
		}
		if (self.y > 2600) {
			self.y = 2600;
			self.velocityY = 0;
		}
	};
	return self;
});
var Tower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('tower', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	return self;
});

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

/**** 
* Game Code
****/ 
game.setBackgroundColor(0x87CEEB);
// Add ground
var ground = game.addChild(LK.getAsset('ground', {
	anchorX: 0.5,
	anchorY: 1.0
}));
ground.x = 1024;
ground.y = 2732;
// Add sun
var sun = game.addChild(LK.getAsset('sun', {
	anchorX: 0.5,
	anchorY: 0.5
}));
sun.x = 1800;
sun.y = 200;
// Add clouds
var clouds = [];
for (var i = 0; i < 5; i++) {
	var cloud = game.addChild(LK.getAsset('cloud', {
		anchorX: 0.5,
		anchorY: 0.5
	}));
	cloud.x = Math.random() * 2048;
	cloud.y = Math.random() * 400 + 100;
	clouds.push(cloud);
}
var scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0x000000
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var airplane = game.addChild(new Airplane());
airplane.x = 200;
airplane.y = 1366;
var tower1 = game.addChild(new Tower());
tower1.x = 10000;
tower1.y = 2732;
var tower2 = game.addChild(new Tower());
tower2.x = 10600;
tower2.y = 2732;
var score = 0;
var gameSpeed = 3;
function updateScore() {
	scoreTxt.setText('Score: ' + score);
}
function checkCollisions() {
	// Check tower collisions
	var currentIntersecting1 = airplane.intersects(tower1);
	var currentIntersecting2 = airplane.intersects(tower2);
	if (!airplane.lastIntersecting1 && currentIntersecting1 || !airplane.lastIntersecting2 && currentIntersecting2) {
		// Just hit a tower
		LK.getSound('crash').play();
		LK.effects.flashScreen(0xff0000, 1000);
		LK.showGameOver();
	}
	airplane.lastIntersecting1 = currentIntersecting1;
	airplane.lastIntersecting2 = currentIntersecting2;
	// Check if airplane passed towers for scoring
	if (airplane.lastX < tower1.x && airplane.x >= tower1.x) {
		score += 10;
		updateScore();
	}
	if (airplane.lastX < tower2.x && airplane.x >= tower2.x) {
		score += 10;
		updateScore();
	}
}
game.down = function (x, y, obj) {
	airplane.jump();
};
game.update = function () {
	airplane.lastX = airplane.x;
	// Move towers left for side-scrolling effect
	tower1.x -= gameSpeed;
	tower2.x -= gameSpeed;
	// Move clouds slowly for background effect
	for (var i = 0; i < clouds.length; i++) {
		clouds[i].x -= gameSpeed * 0.3;
		if (clouds[i].x < -100) {
			clouds[i].x = 2148;
			clouds[i].y = Math.random() * 400 + 100;
		}
	}
	// Reset tower positions when they go off-screen
	if (tower1.x < -100) {
		tower1.x = 10000;
	}
	if (tower2.x < -100) {
		tower2.x = 10600;
	}
	checkCollisions();
	// Check if airplane goes off screen
	if (airplane.x > 2148) {
		airplane.x = 200;
	}
	// Win condition
	if (score >= 100) {
		LK.showYouWin();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -102,9 +102,9 @@
 var tower2 = game.addChild(new Tower());
 tower2.x = 10600;
 tower2.y = 2732;
 var score = 0;
-var gameSpeed = 2;
+var gameSpeed = 3;
 function updateScore() {
 	scoreTxt.setText('Score: ' + score);
 }
 function checkCollisions() {