/**** 
* Classes
****/ 
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics;
	self.speed = -10;
	self.direction = 45; // Add direction variable
	self.update = function () {
		self.y += self.speed * Math.cos(self.direction); // Update y position based on speed and direction
		self.x += self.speed * Math.sin(self.direction); // Update x position based on speed and direction
	};
});
// Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.shoot = function () {
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y - 50;
		bullet.direction = 0;
		bullet.attachAsset('bullet1', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		bullets.push(bullet);
		game.addChild(bullet);
		if (powerUpLevel >= 1) {
			var bullet1 = new Bullet();
			bullet1.x = self.x - 20;
			bullet1.y = self.y - 50;
			bullet1.direction = 20;
			bullet1.attachAsset('bullet2', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			bullets.push(bullet1);
			game.addChild(bullet1);
			var bullet2 = new Bullet();
			bullet2.x = self.x + 20;
			bullet2.y = self.y - 50;
			bullet2.direction = -20;
			bullet2.attachAsset('bullet2', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			bullets.push(bullet2);
			game.addChild(bullet2);
		}
	};
});
// PowerUp class
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	var powerUpGraphics = self.attachAsset('powerUp', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		self.y += 2;
	};
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Spaceship class
var Spaceship = Container.expand(function () {
	var self = Container.call(this);
	var spaceshipGraphics = self.attachAsset('spaceship', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.update = function () {
		self.y += self.speed;
		self.x += Math.sin(self.y / 50) * 5; // Move in a sine wave pattern
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundImage: 'background' //Set the background image
});

/**** 
* Game Code
****/ 
// Function to spawn spaceships at regular intervals
function spawnSpaceships() {
	var spaceship = new Spaceship();
	spaceship.x = Math.random() * 2048; // Random x position
	spaceship.y = -50; // Start above the screen
	spaceships.push(spaceship);
	game.addChild(spaceship);
}
// Initialize player
var player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2500;
// Initialize score
var score = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF
});
score.anchor.set(0.5, 0);
LK.gui.top.addChild(score);
// Initialize arrays
var spaceships = [];
var bullets = [];
var powerUps = [];
// Initialize powerup level
var powerUpLevel = 0;
// Game update function
game.update = function () {
	// Update spaceships
	for (var i = spaceships.length - 1; i >= 0; i--) {
		var spaceship = spaceships[i];
		spaceship.update();
		if (spaceship.y > 2732) {
			spaceship.destroy();
			spaceships[i].splice(spaceships[i].indexOf(spaceship), 1);
			if (spaceships[i].length === 0) {
				spaceships.splice(i, 1);
			}
		}
	}
	// Update bullets
	for (var j = bullets.length - 1; j >= 0; j--) {
		var bullet = bullets[j];
		bullet.update();
		if (bullet.y < 0) {
			bullet.destroy();
			bullets.splice(j, 1);
		}
	}
	// Update power-ups
	for (var k = powerUps.length - 1; k >= 0; k--) {
		var powerUp = powerUps[k];
		powerUp.update();
		if (powerUp.y > 2732) {
			powerUp.destroy();
			powerUps.splice(k, 1);
		}
	}
	// Check for collisions
	checkCollisions();
	// Update score
	score.setText(LK.getScore());
	// Check if score is 100 or more and spawn new enemy waves
	if (LK.getScore() >= 100 && spaceships.length === 0) {
		spawnEnemyWave();
	}
	// Check if score is 200 or more and powerUpLevel is 0
	if (LK.getScore() >= 200 && powerUpLevel == 0) {
		// Only spawn power-up if there are no power-ups currently in the game
		if (powerUps.length == 0) {
			// Spawn power-up
			spawnPowerUp();
		}
	}
};
// Function to check for collisions
function checkCollisions() {
	// Check bullet and spaceship collisions
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		for (var j = spaceships.length - 1; j >= 0; j--) {
			var spaceship = spaceships[j];
			if (bullet.intersects(spaceship)) {
				bullet.destroy();
				spaceship.destroy();
				bullets.splice(i, 1);
				spaceships.splice(j, 1);
				spawnPowerUp(); // Spawn power-up when wave is destroyed
				LK.setScore(LK.getScore() + 10); // Increase score by 10 when a spaceship is destroyed
				break;
			}
		}
	}
	// Check player and power-up collisions
	for (var k = powerUps.length - 1; k >= 0; k--) {
		var powerUp = powerUps[k];
		if (player.intersects(powerUp)) {
			powerUp.destroy();
			powerUps.splice(k, 1);
			powerUpLevel += 1;
			// Upgrade player's gun
		}
		;
	}
}
// Function to spawn a wave of 6 spaceships
function spawnEnemyWave() {
	var wave = [];
	for (var i = 0; i < 6; i++) {
		var spaceship = new Spaceship();
		spaceship.x = (i + 1) * (2048 / 7); // Distribute evenly across the screen
		spaceship.y = -50;
		spaceship.waveIndex = i; // Track index in wave
		wave.push(spaceship);
		game.addChild(spaceship);
	}
	spaceships.push(wave);
}
// Function to spawn power-ups
function spawnPowerUp() {
	var powerUp = new PowerUp();
	powerUp.x = Math.random() * 2048;
	powerUp.y = -50;
	powerUps.push(powerUp);
	game.addChild(powerUp);
}
// Set intervals for spawning
LK.setInterval(spawnSpaceships, 1000);
//LK.setInterval(spawnPowerUp, 10000);
// Player controls
game.down = function (x, y, obj) {
	player.x = x;
	player.y = y;
};
game.move = function (x, y, obj) {
	player.x = x;
	player.y = y;
};
game.up = function (x, y, obj) {
	player.shoot();
};

===================================================================
--- original.js
+++ change.js
@@ -175,13 +175,10 @@
 			if (bullet.intersects(spaceship)) {
 				bullet.destroy();
 				spaceship.destroy();
 				bullets.splice(i, 1);
-				spaceships[j].splice(spaceships[j].indexOf(spaceship), 1);
-				if (spaceships[j].length === 0) {
-					spaceships.splice(j, 1);
-					spawnPowerUp(); // Spawn power-up when wave is destroyed
-				}
+				spaceships.splice(j, 1);
+				spawnPowerUp(); // Spawn power-up when wave is destroyed
 				LK.setScore(LK.getScore() + 10); // Increase score by 10 when a spaceship is destroyed
 				break;
 			}
 		}