/**** 
* 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();
		}
	};
});
// Cloud class
var Cloud = Container.expand(function () {
	var self = Container.call(this);
	// Randomly assign cloud asset
	var cloudAssets = ['cloud1', 'cloud2', 'cloud3'];
	var randomCloud = cloudAssets[Math.floor(Math.random() * cloudAssets.length)];
	var scale = Math.random() * 0.5 + 0.5;
	var cloudSprite = self.attachAsset(randomCloud, {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: scale,
		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) {
			// Remove the cloud from the clouds array
			var index = clouds.indexOf(self);
			if (index > -1) {
				clouds.splice(index, 1);
			}
			// 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 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) {
		dragNode.x = dragNode.initialPosition.x + (x - dragNode.initialTouchPosition.x);
		dragNode.y = dragNode.initialPosition.y + (y - dragNode.initialTouchPosition.y);
	}
};
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
@@ -39,27 +39,17 @@
 	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);
-		// Reset the cloud position if it goes off the screen
+		// Remove the cloud if it goes off the screen
 		if (self.y > 2732 + self.height) {
-			self.y = -self.height;
-			self.x = Math.random() * 2048;
-			// Randomly assign cloud asset
-			var cloudAssets = ['cloud1', 'cloud2', 'cloud3'];
-			var randomCloud = cloudAssets[Math.floor(Math.random() * cloudAssets.length)];
-			// Remove previous cloud asset
-			self.removeChild(cloudSprite);
-			// Assign new cloud asset
-			var scale = Math.random() * 0.5 + 0.5;
-			cloudSprite = self.attachAsset(randomCloud, {
-				anchorX: 0.5,
-				anchorY: 0.5,
-				scaleX: scale,
-				scaleY: scale
-			});
-			// Set alpha value of new asset same as previous
-			cloudSprite.alpha = 0.3;
+			// Remove the cloud from the clouds array
+			var index = clouds.indexOf(self);
+			if (index > -1) {
+				clouds.splice(index, 1);
+			}
+			// Destroy the cloud
+			self.destroy();
 		}
 	};
 });
 // Player's vehicle class
@@ -144,10 +134,17 @@
 	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 () {
-	var cloud = game.addChild(new Cloud());
-	cloud.y = -cloud.height;
-	cloud.x = Math.random() * 2048;
+	// 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);
\ No newline at end of file