/**** 
* Classes
****/ 
// Bullet class for bullets fired by the player's plane
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -15;
	self.update = function () {
		self.y += self.speed;
	};
});
// Enemy class for enemy planes
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		self.y += self.speed;
	};
});
//<Assets used in the game will automatically appear here>
// EnemyBullet class for bullets fired by enemy planes
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.speedX = 0;
	self.speedY = self.speed;
	self.update = function () {
		self.x += self.speedX;
		self.y += self.speedY;
	};
});
// Plane class representing the player's plane
var Plane = Container.expand(function () {
	var self = Container.call(this);
	var planeGraphics = self.attachAsset('plane', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.hp = 100; // Add HP property to Plane
	self.update = function () {
		// Plane update logic, if any
	};
});

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

/**** 
* Game Code
****/ 
// Initialize player plane
var playerPlane = game.addChild(new Plane());
playerPlane.x = 2048 / 2;
playerPlane.y = 2732 - 200;
// Display player HP
var hpText = new Text2('HP: ' + playerPlane.hp, {
	size: 50,
	fill: "#ffffff"
});
hpText.anchor.set(0.5, 0);
LK.gui.topLeft.addChild(hpText);
// Arrays to keep track of bullets and enemies
var bullets = [];
var enemyBullets = [];
var enemies = [];
// Function to handle player movement
function handleMove(x, y, obj) {
	playerPlane.x = x;
	playerPlane.y = y;
}
// Function to spawn enemies
function spawnEnemy() {
	var enemy = new Enemy();
	enemy.x = Math.random() * 2048;
	enemy.y = -50;
	enemies.push(enemy);
	game.addChild(enemy);
	var shootInterval = LK.setInterval(function () {
		if (enemies.includes(enemy)) {
			fireEnemyBullet(enemy);
		} else {
			LK.clearInterval(shootInterval);
		}
	}, 2000);
}
// Function to fire bullets
function fireEnemyBullet(enemy) {
	var bullet = new EnemyBullet();
	bullet.x = enemy.x;
	bullet.y = enemy.y + 50;
	// Set enemy bullet speed to move downwards
	bullet.speedX = 0;
	bullet.speedY = -bullet.speed;
	enemyBullets.push(bullet);
	game.addChild(bullet);
}
function fireBullet() {
	var bullet = new Bullet();
	bullet.x = playerPlane.x;
	bullet.y = playerPlane.y - 50;
	bullets.push(bullet);
	game.addChild(bullet);
}
// Game update loop
game.update = function () {
	// Update enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		enemyBullets[i].update();
		if (enemyBullets[i].y > 2732) {
			enemyBullets[i].destroy();
			enemyBullets.splice(i, 1);
		}
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		bullets[i].update();
		if (bullets[i].y < -50) {
			bullets[i].destroy();
			bullets.splice(i, 1);
		}
	}
	// Update enemies
	for (var j = enemies.length - 1; j >= 0; j--) {
		enemies[j].update();
		if (enemies[j].y > 2732) {
			enemies[j].destroy();
			enemies.splice(j, 1);
		}
	}
	// Check for collisions between player plane and enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		if (playerPlane.intersects(enemyBullets[i])) {
			playerPlane.hp -= 10; // Decrease player HP when hit by enemy bullet
			enemyBullets[i].destroy();
			enemyBullets.splice(i, 1);
			// Update HP display
			hpText.setText('HP: ' + playerPlane.hp);
			// Game over when player HP is 0
			if (playerPlane.hp <= 0) {
				LK.showGameOver();
			}
		}
	}
	// Check for collisions
	for (var k = bullets.length - 1; k >= 0; k--) {
		for (var l = enemies.length - 1; l >= 0; l--) {
			if (bullets[k].intersects(enemies[l])) {
				bullets[k].destroy();
				enemies[l].destroy();
				bullets.splice(k, 1);
				enemies.splice(l, 1);
				break;
			}
		}
	}
};
// Set up event listeners
game.move = handleMove;
game.down = function (x, y, obj) {
	handleMove(x, y, obj);
	fireBullet();
};
// Spawn enemies at intervals
LK.setInterval(spawnEnemy, 2000);

===================================================================
--- original.js
+++ change.js
@@ -9,9 +9,9 @@
 		anchorY: 0.5
 	});
 	self.speed = -15;
 	self.update = function () {
-		self.y -= self.speed;
+		self.y += self.speed;
 	};
 });
 // Enemy class for enemy planes
 var Enemy = Container.expand(function () {