/**** 
* Classes
****/ 
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		width: 15,
		height: 15,
		color: 0xffffff,
		shape: 'box'
	});
	self.speed = -30;
	// Move bullet
	self.move = function () {
		self.x += self.speedX;
		self.y += self.speedY;
	};
});
// EnemyPlane class
var EnemyPlane = Container.expand(function () {
	var self = Container.call(this);
	var enemyPlaneGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = -5;
	self.speedY = 0;
	// Update enemy plane position
	self.update = function () {
		// If the plane has been flying horizontally for 120 frames (2 seconds at 60FPS)
		if (LK.ticks % 120 == 0) {
			// Randomly change the vertical speed between -5 and 5
			self.speedY = Math.floor(Math.random() * 11) - 5;
		}
		self.x += self.speedX;
		self.y += self.speedY;
		if (self.x < 0) {
			self.x = 2048;
		} else if (self.x > 2048) {
			self.x = 0;
		}
		if (self.y < 0) {
			self.y = 0;
			self.speedY = 0;
		} else if (self.y > 2732 - self.height) {
			self.y = 2732 - self.height;
			self.speedY = 0;
		}
	};
	self.shoot = function () {
		var bullet = new Bullet();
		var planeBackX = self.x - self.width / 2 * Math.cos(self.rotation);
		var planeBackY = self.y - self.width / 2 * Math.sin(self.rotation);
		bullet.x = planeBackX;
		bullet.y = planeBackY;
		bullet.speedX = 2 * self.speedX;
		bullet.speedY = 2 * self.speedY;
		bullets.push(bullet);
		game.addChild(bullet);
	};
});
// Plane1 class
var Plane1 = Container.expand(function () {
	var self = Container.call(this);
	var planeGraphics = self.attachAsset('plane', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = 6;
	self.speedY = 0;
	// Update plane position
	self.update = function () {
		self.x += self.speedX;
		self.y += self.speedY;
		// Check if the plane has crossed the screen boundary
		if (self.x < 0) {
			self.x = 2048;
		} else if (self.x > 2048) {
			self.x = 0;
		}
		// Prevent the plane from crossing the floor and ceiling
		if (self.y < 0) {
			self.y = 0;
			self.speedY = 0;
		} else if (self.y > 2752 - self.height) {
			self.y = 2752 - self.height;
			self.speedY = 0;
		}
	};
	// Plane shoots a bullet
	self.shoot = function () {
		var bullet = new Bullet();
		// Set bullet position to the front of the plane
		var planeFrontX = self.x + self.width / 2 * Math.cos(self.rotation);
		var planeFrontY = self.y + self.width / 2 * Math.sin(self.rotation);
		bullet.x = planeFrontX;
		bullet.y = planeFrontY;
		// Set bullet speed to twice the plane's speed in the direction of the plane
		bullet.speedX = 2 * self.speedX;
		bullet.speedY = 2 * self.speedY;
		bullets.push(bullet);
		game.addChild(bullet);
	};
});

/**** 
* Initialize Game
****/ 
// Enemy plane class removed
// Assets are automatically created based on usage in the code.
var game = new LK.Game({
	backgroundColor: 0xffffff // Init game with white background
});

/**** 
* Game Code
****/ 
// Create an enemy plane
var enemyPlane = new EnemyPlane();
enemyPlane.x = 1950;
enemyPlane.y = 2750 - enemyPlane.height;
game.addChild(enemyPlane);
// Add health_bar to the top of the game
var healthBar = LK.gui.top.attachAsset('health_bar', {
	anchorX: 0.5,
	anchorY: 0
});
healthBar.x = 2048 / 8;
healthBar.y = -20;
// Add first heart to the health_bar
var heart1 = healthBar.attachAsset('heart', {
	anchorX: 0.5,
	anchorY: 0.5
});
heart1.x = 395;
heart1.y = 90;
// Ensure the heart is always in the foreground
if (healthBar.children.length > 0) {
	healthBar.setChildIndex(heart1, healthBar.children.length - 1);
} else {
	healthBar.addChild(heart1);
}
// Add second heart to the health_bar
var heart2 = healthBar.attachAsset('heart', {
	anchorX: 0.5,
	anchorY: 0.5
});
heart2.x = 280;
heart2.y = 90;
// Ensure the heart is always in the foreground
if (healthBar.children.length > 0) {
	healthBar.setChildIndex(heart2, healthBar.children.length - 1);
} else {
	healthBar.addChild(heart2);
}
// Add third heart to the health_bar
var heart3 = healthBar.attachAsset('heart', {
	anchorX: 0.5,
	anchorY: 0.5
});
heart3.x = 165;
heart3.y = 90;
// Ensure the heart is always in the foreground
if (healthBar.children.length > 0) {
	healthBar.setChildIndex(heart3, healthBar.children.length - 1);
} else {
	healthBar.addChild(heart3);
}
// Add death image to the health_bar
var deathImage = healthBar.attachAsset('death', {
	anchorX: 0.5,
	anchorY: 0.5
});
deathImage.x = -600;
deathImage.y = 90;
// Ensure the death image is always in the foreground
if (healthBar.children.length > 0) {
	healthBar.setChildIndex(deathImage, healthBar.children.length - 1);
} else {
	healthBar.addChild(deathImage);
}
// Add background to the bottom of the game
var background = game.attachAsset('background', {
	anchorX: 0,
	anchorY: 1,
	scaleX: 1,
	scaleY: 1
});
background.y = 2732;
var bullets = []; // Global array to keep track of bullets
var bullets = []; // Global array to keep track of bullets
// Create a player plane
var plane1 = new Plane1();
plane1.x = 100;
plane1.y = 2750 - plane1.height; // Bottom of the screen
game.addChild(plane1);
// Set up game tick
LK.on('tick', function () {
	plane1.update();
	enemyPlane.update();
	// Plane shoots a bullet every 0.8 seconds
	if (LK.ticks % 48 == 0) {
		plane1.shoot();
		enemyPlane.shoot();
	}
	// Update and check bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		bullets[i].move();
		// Remove off-screen bullets
		if (bullets[i].x > 2048 || bullets[i].y > 2732) {
			bullets[i].destroy();
			bullets.splice(i, 1);
		}
	}
});
// Flags to track if the screen is being touched
var isTouchingLeft = false;
var isTouchingRight = false;
// Change plane direction when the screen is touched
var initialTouchPosition = null;
game.on('down', function (obj) {
	initialTouchPosition = obj.event.getLocalPosition(game);
});
game.on('move', function (obj) {
	if (initialTouchPosition) {
		var currentTouchPosition = obj.event.getLocalPosition(game);
		var swipeDirection = currentTouchPosition.x - initialTouchPosition.x;
		if (swipeDirection < 0) {
			isTouchingLeft = true;
			isTouchingRight = false;
		} else if (swipeDirection > 0) {
			isTouchingRight = true;
			isTouchingLeft = false;
		}
	}
});
// Stop changing plane direction when the screen is no longer being touched
game.on('up', function (obj) {
	isTouchingLeft = false;
	isTouchingRight = false;
	initialTouchPosition = null;
});
// In the game tick, change plane direction while the screen is being touched
LK.on('tick', function () {
	if (isTouchingLeft) {
		var angle = Math.atan2(plane1.speedY, plane1.speedX);
		angle -= Math.PI / 60; // Subtract 1.5 degrees (in radians) for counter-clockwise rotation
		plane1.speedX = Math.cos(angle) * 6;
		plane1.speedY = Math.sin(angle) * 6;
		plane1.rotation -= Math.PI / 60; // Rotate the plane counter-clockwise
	}
	if (isTouchingRight && LK.ticks > 78) {
		var angle = Math.atan2(plane1.speedY, plane1.speedX);
		angle += Math.PI / 60; // Add 1.5 degrees (in radians) for clockwise rotation
		plane1.speedX = Math.cos(angle) * 6;
		plane1.speedY = Math.sin(angle) * 6;
		plane1.rotation += Math.PI / 60; // Rotate the plane clockwise
	}
	// Check if the plane touches the top or bottom of the screen or collides with the health_bar
	if (plane1.y <= 0 || plane1.y >= 2752 - plane1.height || plane1.intersects(healthBar)) {
		// Trigger game over
		LK.showGameOver();
	}
});

===================================================================
--- original.js
+++ change.js
@@ -27,8 +27,13 @@
 	self.speedX = -5;
 	self.speedY = 0;
 	// Update enemy plane position
 	self.update = function () {
+		// If the plane has been flying horizontally for 120 frames (2 seconds at 60FPS)
+		if (LK.ticks % 120 == 0) {
+			// Randomly change the vertical speed between -5 and 5
+			self.speedY = Math.floor(Math.random() * 11) - 5;
+		}
 		self.x += self.speedX;
 		self.y += self.speedY;
 		if (self.x < 0) {
 			self.x = 2048;
@@ -112,10 +117,10 @@
 * Game Code
 ****/ 
 // Create an enemy plane
 var enemyPlane = new EnemyPlane();
-enemyPlane.x = 150;
-enemyPlane.y = 150;
+enemyPlane.x = 1950;
+enemyPlane.y = 2750 - enemyPlane.height;
 game.addChild(enemyPlane);
 // Add health_bar to the top of the game
 var healthBar = LK.gui.top.attachAsset('health_bar', {
 	anchorX: 0.5,