/**** 
* Classes
****/ 
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	// Attach the bullet sprite
	var bulletSprite = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Set bullet speed
	self.speed = -10;
	// This is automatically called every game tick, if the bullet is attached!
	self.update = function () {
		self.y += self.speed;
		// Destroy the bullet if it goes off the screen
		if (self.y < -self.height) {
			self.destroy();
		}
	};
});
// CityTiles class
var CityTiles = Container.expand(function () {
	var self = Container.call(this);
	// Attach the city tiles sprite
	var cityTilesSprite = self.attachAsset('CityTiles', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2,
		scaleY: 2
	});
	// Set city tiles speed
	self.speed = 0.1;
	// This is automatically called every game tick, if the city tiles are attached!
	self.update = function () {
		self.y += self.speed;
		// Reset the position if the city tiles go off the screen
		if (self.y > 2732 + self.height / 2) {
			self.y = -self.height / 2;
		}
	};
});
// Cloud class
var Cloud = Container.expand(function () {
	var self = Container.call(this);
	// Randomly assign cloud asset
	var cloudAssets = ['cloud1', 'cloud2', 'cloud3', 'cloud4', 'cloud5'];
	var randomCloud = cloudAssets.splice(Math.floor(Math.random() * cloudAssets.length), 1)[0];
	var scale = Math.random() * 0.5 + 0.5;
	// Mirror cloud sprites 50% of the time
	var flipX = Math.random() > 0.5 ? -1 : 1;
	var cloudSprite = self.attachAsset(randomCloud, {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: scale * flipX,
		scaleY: scale
	});
	// Set cloud sprite to be 70% transparent
	cloudSprite.alpha = 0.3;
	// Set cloud speed
	self.speed = Math.random() * 3 + 2;
	// This is automatically called every game tick, if the cloud is attached!
	self.update = function () {
		self.y += self.speed * (1 + self.x / 2048 * 0.5);
		// Remove the cloud if it goes off the screen
		if (self.y > 2732 + self.height / 2) {
			// Remove the cloud from the clouds array
			var index = clouds.indexOf(self);
			if (index > -1) {
				clouds.splice(index, 1);
				cloudAssets.push(randomCloud); // Add the cloud back to the cloudAssets array
			}
			// Destroy the cloud
			self.destroy();
		}
	};
});
// Player's vehicle class
var PlayerVehicle = Container.expand(function () {
	var self = Container.call(this);
	// Attach the player's vehicle sprite
	var vehicleSprite = self.attachAsset('playerVehicle', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2,
		scaleY: 2
	});
	// This is automatically called every game tick, if the player's vehicle is attached!
	self.update = function () {
		// Fire a bullet every 30 ticks
		if (LK.ticks % 30 == 0) {
			var bullet = new Bullet();
			bullet.x = self.x;
			bullet.y = self.y - self.height / 2 - bullet.height / 2;
			game.addChild(bullet);
		}
	};
	// Add touch event handlers to the player's vehicle to enable dragging
	self.down = function (x, y, obj) {
		// Store the initial touch position
		self.initialTouchPosition = {
			x: x,
			y: y
		};
		// Store the initial position of the player's vehicle
		self.initialPosition = {
			x: self.x,
			y: self.y
		};
	};
	self.move = function (x, y, obj) {
		// Update the position of the player's vehicle relative to the speed and direction at which the player moves their finger
		self.x = self.initialPosition.x + (x - self.initialTouchPosition.x);
		self.y = self.initialPosition.y + (y - self.initialTouchPosition.y);
	};
	self.up = function (x, y, obj) {
		// Reset the initial touch position and the initial position of the player's vehicle
		self.initialTouchPosition = null;
		self.initialPosition = null;
	};
});

/**** 
* Initialize Game
****/ 
// Add player's vehicle to the game
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
// Add CityTiles to the game and repeat to fill the screen horizontally
var cityTilesArray = [];
for (var i = 0; i < Math.ceil(2048 / 400) + 1; i++) {
	// 400 is the new width of a single CityTile
	for (var j = 0; j < Math.ceil(2732 / 400) + 1; j++) {
		// 400 is the new height of a single CityTile
		var cityTile = game.addChild(new CityTiles());
		cityTile.x = i * 400; // Position each tile next to the previous one horizontally
		cityTile.y = j * 400; // Position each tile next to the previous one vertically
		cityTilesArray.push(cityTile);
	}
}
// Add player's vehicle to the game
var playerVehicle = game.addChild(new PlayerVehicle());
playerVehicle.x = 2048 / 2;
playerVehicle.y = 2732 - playerVehicle.height / 2;
var dragNode = null;
game.down = function (x, y, obj) {
	dragNode = playerVehicle;
	dragNode.initialTouchPosition = {
		x: x,
		y: y
	};
	dragNode.initialPosition = {
		x: playerVehicle.x,
		y: playerVehicle.y
	};
};
game.move = function (x, y, obj) {
	if (dragNode) {
		var newX = dragNode.initialPosition.x + (x - dragNode.initialTouchPosition.x);
		var newY = dragNode.initialPosition.y + (y - dragNode.initialTouchPosition.y);
		// Limit player vehicle movement to within the screen
		newX = Math.max(Math.min(newX, 2048 - dragNode.width / 2), dragNode.width / 2);
		newY = Math.max(Math.min(newY, 2732 - dragNode.height / 2), dragNode.height / 2);
		dragNode.x = newX;
		dragNode.y = newY;
	}
};
game.up = function (x, y, obj) {
	if (dragNode) {
		dragNode = null;
	}
};
// Create an array to store the clouds
var clouds = [];
// Create a timer to add clouds at random intervals between 1 and 5 seconds
var cloudTimer = LK.setInterval(function () {
	// Check if there are less than 4 clouds on screen
	if (clouds.length < 4) {
		var cloud = game.addChild(new Cloud());
		cloud.y = -cloud.height;
		cloud.x = Math.random() * 2048;
		// Add the new cloud to the clouds array
		clouds.push(cloud);
	}
}, Math.random() * 4000 + 1000);

===================================================================
--- original.js
+++ change.js
@@ -133,15 +133,15 @@
 * Game Code
 ****/ 
 // Add CityTiles to the game and repeat to fill the screen horizontally
 var cityTilesArray = [];
-for (var i = 0; i < Math.ceil(2048 / 200) + 1; i++) {
-	// 200 is the width of a single CityTile
-	for (var j = 0; j < Math.ceil(2732 / 195.31) + 1; j++) {
-		// 195.31 is the height of a single CityTile
+for (var i = 0; i < Math.ceil(2048 / 400) + 1; i++) {
+	// 400 is the new width of a single CityTile
+	for (var j = 0; j < Math.ceil(2732 / 400) + 1; j++) {
+		// 400 is the new height of a single CityTile
 		var cityTile = game.addChild(new CityTiles());
-		cityTile.x = i * 200; // Position each tile next to the previous one horizontally
-		cityTile.y = j * 195.31; // Position each tile next to the previous one vertically
+		cityTile.x = i * 400; // Position each tile next to the previous one horizontally
+		cityTile.y = j * 400; // Position each tile next to the previous one vertically
 		cityTilesArray.push(cityTile);
 	}
 }
 // Add player's vehicle to the game