/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
// Class for enemy bullets
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = new Graphics();
	bulletGraphics.beginFill(0xFF0000);
	bulletGraphics.drawCircle(0, 0, 10);
	bulletGraphics.endFill();
	self.addChild(bulletGraphics);
	self.speed = 8;
	self.update = function () {
		self.y += self.speed;
		// Destroy if off-screen
		if (self.y > SCREEN_HEIGHT + 20) {
			self.destroy();
			var index = enemyBullets.indexOf(self);
			if (index !== -1) {
				enemyBullets.splice(index, 1);
			}
		}
	};
	return self;
});
// Class for enemy ships with wave-based spawning and better animation
var EnemyShip = Container.expand(function (type) {
	var self = Container.call(this);
	self.type = type || ENEMY_TYPES.BASIC;
	var enemyGraphics = self.attachAsset('enemyShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Set properties based on enemy type
	switch (self.type) {
		case ENEMY_TYPES.FAST:
			enemyGraphics.tint = 0x00FF00;
			self.speed = 5 + Math.random() * 2;
			self.health = 1;
			self.scoreValue = 2;
			self.driftAmount = 6;
			break;
		case ENEMY_TYPES.TANK:
			enemyGraphics.tint = 0xFF0000;
			self.speed = 2 + Math.random() * 1;
			self.health = 3;
			self.scoreValue = 3;
			self.driftAmount = 2;
			break;
		case ENEMY_TYPES.BOSS:
			enemyGraphics.tint = 0xFF00FF;
			enemyGraphics.scale.set(1.5);
			self.speed = 1.5;
			self.health = 15;
			self.scoreValue = 10;
			self.driftAmount = 3;
			break;
		default:
			// BASIC
			self.speed = 3 + Math.random() * 2;
			self.health = 1;
			self.scoreValue = 1;
			self.driftAmount = 3;
	}
	// Spawn animation: Fade in & Scale up
	enemyGraphics.scale.set(0);
	enemyGraphics.alpha = 0;
	tween(enemyGraphics.scale, {
		x: self.type === ENEMY_TYPES.BOSS ? 1.5 : 1,
		y: self.type === ENEMY_TYPES.BOSS ? 1.5 : 1
	}, {
		duration: 500
	});
	tween(enemyGraphics, {
		alpha: 1
	}, {
		duration: 500
	});
	self.driftSpeed = 50 + Math.random() * 20; // Slight variation in drift speed
	self.shootCooldown = self.type === ENEMY_TYPES.BOSS ? 1500 : 3000; // Boss shoots more frequently
	self.canShoot = true;
	self.hit = function () {
		self.health -= 1;
		if (self.health <= 0) {
			self.explode();
			return true; // Enemy destroyed
		}
		// Flash effect when hit but not destroyed
		tween(enemyGraphics, {
			alpha: 0.2
		}, {
			duration: 100,
			onFinish: function onFinish() {
				tween(enemyGraphics, {
					alpha: 1
				}, {
					duration: 100
				});
			}
		});
		// Emit particles when hit
		particleSystem.emit(self.x, self.y, 5);
		return false; // Enemy still alive
	};
	self.explode = function () {
		// Play explosion sound
		LK.sound.play('explosion', {
			volume: 0.5
		});
		// Emit particles for explosion
		particleSystem.emit(self.x, self.y, 20);
		// Chance to drop powerup (higher chance for bosses)
		var dropChance = self.type === ENEMY_TYPES.BOSS ? 0.8 : 0.1;
		if (Math.random() < dropChance) {
			spawnPowerup(self.x, self.y);
		}
		tween(enemyGraphics, {
			alpha: 0
		}, {
			duration: 300,
			onFinish: function onFinish() {
				self.destroy();
				enemyShips.splice(enemyShips.indexOf(self), 1);
				// Add score
				increaseScore(self.scoreValue || 1);
			}
		});
		tween(enemyGraphics.scale, {
			x: 1.5,
			y: 1.5
		}, {
			duration: 300
		});
	};
	self.shoot = function () {
		if (!self.canShoot) {
			return;
		}
		var bullet = new EnemyBullet();
		bullet.x = self.x;
		bullet.y = self.y + enemyGraphics.height / 2;
		game.addChild(bullet);
		enemyBullets.push(bullet);
		self.canShoot = false;
		LK.setTimeout(function () {
			self.canShoot = true;
		}, self.shootCooldown);
	};
	self.update = function () {
		self.y += self.speed;
		self.x += Math.sin(LK.ticks / self.driftSpeed) * self.driftAmount;
		// Bosses and some enemies shoot at the player
		if ((self.type === ENEMY_TYPES.BOSS || Math.random() < 0.005) && self.y > 0) {
			self.shoot();
		}
		// Destroy if off-screen with fade-out effect
		if (self.y > SCREEN_HEIGHT + enemyGraphics.height / 2) {
			tween(enemyGraphics, {
				alpha: 0
			}, {
				duration: 500,
				onFinish: function onFinish() {
					self.destroy();
					var index = enemyShips.indexOf(self);
					if (index !== -1) {
						enemyShips.splice(index, 1);
					}
				}
			});
		}
	};
	return self;
});
/**** 
* Particle System
****/ 
var ParticleSystem = Container.expand(function (config) {
	var self = Container.call(this);
	self.particles = [];
	self.maxParticles = config.maxParticles || 20;
	self.minLifetime = config.minLifetime || 300;
	self.maxLifetime = config.maxLifetime || 600;
	self.minSpeed = config.minSpeed || 1;
	self.maxSpeed = config.maxSpeed || 3;
	self.colors = config.colors || [0xFFFFFF];
	self.size = config.size || 5;
	self.emit = function (x, y, count) {
		count = count || 10;
		for (var i = 0; i < count && self.particles.length < self.maxParticles; i++) {
			var angle = Math.random() * Math.PI * 2;
			var speed = self.minSpeed + Math.random() * (self.maxSpeed - self.minSpeed);
			var lifetime = self.minLifetime + Math.random() * (self.maxLifetime - self.minLifetime);
			var particle = new Graphics();
			particle.beginFill(self.colors[Math.floor(Math.random() * self.colors.length)]);
			particle.drawCircle(0, 0, self.size);
			particle.endFill();
			particle.x = x;
			particle.y = y;
			particle.vx = Math.cos(angle) * speed;
			particle.vy = Math.sin(angle) * speed;
			particle.alpha = 1;
			particle.lifetime = lifetime;
			self.addChild(particle);
			self.particles.push(particle);
		}
	};
	self.update = function () {
		for (var i = self.particles.length - 1; i >= 0; i--) {
			var p = self.particles[i];
			p.x += p.vx;
			p.y += p.vy;
			p.lifetime -= LK.deltaTime;
			p.alpha = p.lifetime / self.maxLifetime;
			if (p.lifetime <= 0) {
				p.destroy();
				self.particles.splice(i, 1);
			}
		}
	};
	return self;
});
// Class for player bullets with proper destruction
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -15;
	self.update = function () {
		self.y += self.speed;
		// Add trail effect
		if (LK.ticks % 3 === 0) {
			particleSystem.emit(self.x, self.y + bulletGraphics.height / 2, 1);
		}
		if (self.y < -bulletGraphics.height) {
			self.destroy();
			var index = playerBullets.indexOf(self);
			if (index !== -1) {
				playerBullets.splice(index, 1);
			}
		}
	};
	return self;
});
// Class for the player's ship with shooting cooldown
var PlayerShip = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('playerShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Shield graphics
	var shieldGraphics = self.attachAsset('shield', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	shieldGraphics.visible = false;
	self.defaultSpeed = 10;
	self.speed = self.defaultSpeed;
	self.canShoot = true; // Prevents spam shooting
	self.shootCooldown = 300; // 300ms cooldown
	self.lives = 3; // Player starts with 3 lives
	self.invulnerable = false; // Invulnerability after being hit
	self.hasTripleShot = false;
	self.hasShield = false;
	self.tripleShotTimer = null;
	self.shieldTimer = null;
	self.speedBoostTimer = null;
	// Thruster particles
	self.thrusterParticles = function () {
		if (LK.ticks % 3 === 0) {
			particleSystem.emit(self.x, self.y + shipGraphics.height / 2, 2);
		}
	};
	self.shoot = function () {
		if (self.canShoot) {
			// Play shoot sound
			LK.sound.play('shoot', {
				volume: 0.3
			});
			if (self.hasTripleShot) {
				// Triple shot pattern
				for (var i = -1; i <= 1; i++) {
					var bullet = new PlayerBullet();
					bullet.x = self.x + i * 30;
					bullet.y = self.y - shipGraphics.height / 2;
					game.addChild(bullet);
					playerBullets.push(bullet);
				}
			} else {
				// Single shot
				var bullet = new PlayerBullet();
				bullet.x = self.x;
				bullet.y = self.y - shipGraphics.height / 2;
				game.addChild(bullet);
				playerBullets.push(bullet);
			}
			self.canShoot = false;
			LK.setTimeout(function () {
				self.canShoot = true;
			}, self.shootCooldown);
		}
	};
	self.hit = function () {
		if (self.invulnerable) {
			return;
		}
		// If player has shield, remove it instead of taking damage
		if (self.hasShield) {
			self.setShield(false);
			// Special shield break effect
			particleSystem.emit(self.x, self.y, 30);
			// Brief invulnerability after shield breaks
			self.invulnerable = true;
			LK.setTimeout(function () {
				self.invulnerable = false;
			}, 1000);
			return;
		}
		self.lives--;
		updateLivesDisplay();
		if (self.lives <= 0) {
			// Final explosion effect
			particleSystem.emit(self.x, self.y, 50);
			LK.showGameOver();
			return;
		}
		// Make player invulnerable temporarily
		self.invulnerable = true;
		// Flash effect
		var flashCount = 0;
		var flashInterval = LK.setInterval(function () {
			shipGraphics.alpha = shipGraphics.alpha === 1 ? 0.3 : 1;
			flashCount++;
			if (flashCount >= 10) {
				LK.clearInterval(flashInterval);
				shipGraphics.alpha = 1;
				self.invulnerable = false;
			}
		}, 150);
	};
	// Powerup methods
	self.setTripleShot = function (active) {
		self.hasTripleShot = active;
		// Show triple shot status
		showStatusMessage(active ? "TRIPLE SHOT!" : "Triple shot expired", 0x00FFFF);
		// Clear existing timer if any
		if (self.tripleShotTimer) {
			LK.clearTimeout(self.tripleShotTimer);
		}
		// Set timer to remove triple shot
		if (active) {
			self.tripleShotTimer = LK.setTimeout(function () {
				self.setTripleShot(false);
			}, 10000); // 10 seconds
		}
	};
	self.setShield = function (active) {
		self.hasShield = active;
		shieldGraphics.visible = active;
		if (active) {
			// Show shield animation
			shieldGraphics.scale.set(0);
			tween(shieldGraphics.scale, {
				x: 1,
				y: 1
			}, {
				duration: 300
			});
			showStatusMessage("SHIELD ACTIVATED!", 0x0088FF);
		}
		// Clear existing timer if any
		if (self.shieldTimer) {
			LK.clearTimeout(self.shieldTimer);
		}
		// Set timer to remove shield
		if (active) {
			self.shieldTimer = LK.setTimeout(function () {
				if (self.hasShield) {
					self.setShield(false);
					showStatusMessage("Shield expired", 0x0088FF);
				}
			}, 15000); // 15 seconds
		}
	};
	self.setSpeedBoost = function (active) {
		self.speed = active ? self.defaultSpeed * 1.5 : self.defaultSpeed;
		showStatusMessage(active ? "SPEED BOOST!" : "Speed boost expired", 0xFFFF00);
		// Clear existing timer if any
		if (self.speedBoostTimer) {
			LK.clearTimeout(self.speedBoostTimer);
		}
		// Set timer to remove speed boost
		if (active) {
			self.speedBoostTimer = LK.setTimeout(function () {
				self.setSpeedBoost(false);
			}, 8000); // 8 seconds
		}
	};
	self.addLife = function () {
		self.lives++;
		updateLivesDisplay();
		showStatusMessage("EXTRA LIFE!", 0xFF0000);
	};
	self.update = function () {
		// Thruster effect
		self.thrusterParticles();
		// Shield rotation effect
		if (self.hasShield) {
			shieldGraphics.rotation += 0.01;
		}
		if (self.invulnerable) {
			return;
		}
		// Check collision with enemy ships
		for (var i = 0; i < enemyShips.length; i++) {
			if (self.intersects(enemyShips[i])) {
				self.hit();
				enemyShips[i].explode();
				break;
			}
		}
		// Check collision with enemy bullets
		for (var j = 0; j < enemyBullets.length; j++) {
			if (self.intersects(enemyBullets[j])) {
				self.hit();
				enemyBullets[j].destroy();
				enemyBullets.splice(j, 1);
				break;
			}
		}
		// Check collision with powerups
		for (var k = 0; k < powerups.length; k++) {
			if (self.intersects(powerups[k])) {
				powerups[k].collect();
				break;
			}
		}
	};
	return self;
});
// Class for powerups
var Powerup = Container.expand(function (type) {
	var self = Container.call(this);
	self.type = type || POWERUP_TYPES.TRIPLE_SHOT;
	var powerupGraphics = self.attachAsset('powerup', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Set color based on powerup type
	switch (self.type) {
		case POWERUP_TYPES.TRIPLE_SHOT:
			powerupGraphics.tint = 0x00FFFF;
			break;
		case POWERUP_TYPES.SHIELD:
			powerupGraphics.tint = 0x0000FF;
			break;
		case POWERUP_TYPES.SPEED:
			powerupGraphics.tint = 0xFFFF00;
			break;
		case POWERUP_TYPES.LIFE:
			powerupGraphics.tint = 0xFF0000;
			break;
	}
	// Floating animation
	self.floatOffset = Math.random() * Math.PI * 2;
	self.speed = 2 + Math.random();
	self.update = function () {
		self.y += self.speed;
		self.x += Math.sin((LK.ticks + self.floatOffset) / 20) * 1.5;
		// Add sparkle effect
		if (LK.ticks % 10 === 0) {
			particleSystem.emit(self.x, self.y, 1);
		}
		// Destroy if off-screen
		if (self.y > SCREEN_HEIGHT + powerupGraphics.height) {
			self.destroy();
			var index = powerups.indexOf(self);
			if (index !== -1) {
				powerups.splice(index, 1);
			}
		}
	};
	self.collect = function () {
		// Play powerup sound
		LK.sound.play('powerup', {
			volume: 0.7
		});
		// Apply powerup effect
		switch (self.type) {
			case POWERUP_TYPES.TRIPLE_SHOT:
				player.setTripleShot(true);
				break;
			case POWERUP_TYPES.SHIELD:
				player.setShield(true);
				break;
			case POWERUP_TYPES.SPEED:
				player.setSpeedBoost(true);
				break;
			case POWERUP_TYPES.LIFE:
				player.addLife();
				break;
		}
		// Remove powerup with effect
		tween(powerupGraphics.scale, {
			x: 2,
			y: 2
		}, {
			duration: 200
		});
		tween(powerupGraphics, {
			alpha: 0
		}, {
			duration: 200,
			onFinish: function onFinish() {
				self.destroy();
				powerups.splice(powerups.indexOf(self), 1);
			}
		});
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
/**** 
* Game Constants
****/ 
// Replace with actual sound ID
// Replace with actual sound ID
// Replace with actual sound ID
// Replace with actual powerup image ID
// Replace with actual background image ID
// Additional assets
// Add scrolling background
var SCREEN_WIDTH = 2048;
var SCREEN_HEIGHT = 2732;
var ENEMY_TYPES = {
	BASIC: 'basic',
	FAST: 'fast',
	TANK: 'tank',
	BOSS: 'boss'
};
var POWERUP_TYPES = {
	TRIPLE_SHOT: 'tripleShot',
	SHIELD: 'shield',
	SPEED: 'speed',
	LIFE: 'life'
};
function createScrollingBackground() {
	var bg1 = game.addChild(LK.getAsset('background', {
		anchorX: 0.5,
		anchorY: 0.5
	}));
	var bg2 = game.addChild(LK.getAsset('background', {
		anchorX: 0.5,
		anchorY: 0.5
	}));
	bg1.y = 0;
	bg2.y = -SCREEN_HEIGHT;
	game.updateBackground = function () {
		bg1.y += 1;
		bg2.y += 1;
		if (bg1.y >= SCREEN_HEIGHT) {
			bg1.y = bg2.y - SCREEN_HEIGHT;
		}
		if (bg2.y >= SCREEN_HEIGHT) {
			bg2.y = bg1.y - SCREEN_HEIGHT;
		}
	};
}
/**** 
* Game Variables
****/ 
var playerBullets = [];
var enemyBullets = [];
var enemyShips = [];
var powerups = [];
var player = game.addChild(new PlayerShip());
player.x = SCREEN_WIDTH / 2;
player.y = SCREEN_HEIGHT - 200;
// Create particle system
var particleSystem = game.addChild(new ParticleSystem({
	maxParticles: 200,
	minLifetime: 300,
	maxLifetime: 800,
	minSpeed: 1,
	maxSpeed: 4,
	colors: [0x00FFFF, 0x0088FF, 0xFFFFFF],
	size: 4
}));
// Score Display
var scoreText = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0.5, 0);
scoreText.x = SCREEN_WIDTH / 2;
scoreText.y = 50;
LK.gui.top.addChild(scoreText);
// Lives Display
var livesText = new Text2('Lives: 3', {
	size: 100,
	fill: 0xFFFFFF
});
livesText.anchor.set(0, 0);
livesText.x = 50;
livesText.y = 50;
LK.gui.top.addChild(livesText);
// Wave Display
var waveText = new Text2('Wave: 1', {
	size: 100,
	fill: 0xFFFFFF
});
waveText.anchor.set(1, 0);
waveText.x = SCREEN_WIDTH - 50;
waveText.y = 50;
LK.gui.top.addChild(waveText);
// Status message display
var statusMessage = new Text2('', {
	size: 100,
	fill: 0xFFFFFF
});
statusMessage.anchor.set(0.5, 0);
statusMessage.x = SCREEN_WIDTH / 2;
statusMessage.y = 200;
statusMessage.alpha = 0;
LK.gui.top.addChild(statusMessage);
// Wave Variables
var waveNumber = 1;
var enemiesPerWave = 5;
var enemiesSpawned = 0;
var waveInProgress = true;
var waveCooldown = false;
/**** 
* Helper Functions
****/ 
function updateLivesDisplay() {
	livesText.setText('Lives: ' + player.lives);
}
function increaseScore(amount) {
	LK.setScore(LK.getScore() + amount);
	scoreText.setText(LK.getScore());
}
function updateWaveDisplay() {
	waveText.setText('Wave: ' + waveNumber);
}
function showStatusMessage(message, color) {
	statusMessage.setText(message);
	statusMessage.style.fill = color || 0xFFFFFF;
	statusMessage.alpha = 1;
	// Animation
	statusMessage.scale.set(0.8);
	tween(statusMessage.scale, {
		x: 1,
		y: 1
	}, {
		duration: 300
	});
	// Fade out
	tween(statusMessage, {
		alpha: 0
	}, {
		duration: 1500,
		delay: 1000
	});
}
function spawnPowerup(x, y) {
	var types = Object.values(POWERUP_TYPES);
	var type = types[Math.floor(Math.random() * types.length)];
	var powerup = new Powerup(type);
	powerup.x = x;
	powerup.y = y;
	game.addChild(powerup);
	powerups.push(powerup);
}
// Function to spawn enemies in waves
function spawnEnemy() {
	if (!waveInProgress || waveCooldown) {
		return;
	}
	if (enemiesSpawned < enemiesPerWave) {
		var enemy;
		var enemyType;
		// Every 3 waves, add a boss as the last enemy
		if (waveNumber > 0 && waveNumber % 3 === 0 && enemiesSpawned === enemiesPerWave - 1) {
			enemyType = ENEMY_TYPES.BOSS;
		} else {
			// Determine enemy type based on wave number and random chance
			var random = Math.random();
			if (waveNumber >= 5 && random < 0.2) {
				enemyType = ENEMY_TYPES.TANK;
			} else if (waveNumber >= 3 && random < 0.4) {
				enemyType = ENEMY_TYPES.FAST;
			} else {
				enemyType = ENEMY_TYPES.BASIC;
			}
		}
		enemy = new EnemyShip(enemyType);
		enemy.x = Math.random() * SCREEN_WIDTH;
		enemy.y = -100;
		game.addChild(enemy);
		enemyShips.push(enemy);
		enemiesSpawned++;
		if (enemiesSpawned >= enemiesPerWave) {
			waveInProgress = false;
		}
	}
}
function startNextWave() {
	waveNumber++;
	updateWaveDisplay();
	enemiesPerWave += 2; // Increase difficulty each wave
	enemiesSpawned = 0;
	waveInProgress = true;
	// Display wave number
	var newWaveText = new Text2('WAVE ' + waveNumber, {
		size: 250,
		fill: 0xFFFFFF
	});
	newWaveText.anchor.set(0.5, 0.5);
	newWaveText.x = SCREEN_WIDTH / 2;
	newWaveText.y = SCREEN_HEIGHT / 2;
	game.addChild(newWaveText);
	// Animate and remove wave text
	tween(newWaveText.scale, {
		x: 1.5,
		y: 1.5
	}, {
		duration: 800,
		onFinish: function onFinish() {
			tween(newWaveText, {
				alpha: 0
			}, {
				duration: 500,
				onFinish: function onFinish() {
					newWaveText.destroy();
				}
			});
		}
	});
}
// Initialize game elements
function initGame() {
	createScrollingBackground();
	showStatusMessage("GET READY!", 0xFFFFFF);
}
// Call initialization
initGame();
/**** 
* Game update loop
****/ 
game.update = function () {
	// Update scrolling background
	if (game.updateBackground) {
		game.updateBackground();
	}
	// Update particle system
	particleSystem.update();
	// Update player
	player.update();
	// Update player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		if (playerBullets[i]) {
			playerBullets[i].update();
		}
	}
	// Update enemy bullets
	for (var j = enemyBullets.length - 1; j >= 0; j--) {
		if (enemyBullets[j]) {
			enemyBullets[j].update();
		}
	}
	// Update powerups
	for (var l = powerups.length - 1; l >= 0; l--) {
		if (powerups[l]) {
			powerups[l].update();
		}
	}
	// Check for collisions between player bullets and enemy ships
	for (var m = playerBullets.length - 1; m >= 0; m--) {
		if (!playerBullets[m]) {
			continue;
		}
		for (var n = enemyShips.length - 1; n >= 0; n--) {
			if (!enemyShips[n]) {
				continue;
			}
			if (playerBullets[m] && enemyShips[n] && playerBullets[m].intersects(enemyShips[n])) {
				// Enemy hit by bullet
				var destroyed = enemyShips[n].hit();
				// Remove bullet
				playerBullets[m].destroy();
				playerBullets.splice(m, 1);
				break;
			}
		}
	}
	// Spawn enemies periodically
	if (LK.ticks % 60 === 0) {
		spawnEnemy();
	}
	// Check if wave is complete and start next wave
	if (!waveInProgress && enemyShips.length === 0 && !waveCooldown) {
		waveCooldown = true;
		LK.setTimeout(function () {
			startNextWave();
			waveCooldown = false;
		}, 2000);
	}
};
// Handle player movement
game.move = function (x, y, obj) {
	// Calculate movement based on speed
	var targetX = x;
	var currentX = player.x;
	var dx = targetX - currentX;
	// Apply player speed
	if (Math.abs(dx) > player.speed) {
		dx = Math.sign(dx) * player.speed;
	}
	// Constrain player to screen boundaries
	var halfWidth = player.getChildAt(0).width / 2;
	player.x = Math.min(Math.max(currentX + dx, halfWidth), SCREEN_WIDTH - halfWidth);
};
// Handle shooting
game.down = function (x, y, obj) {
	player.shoot();
};
// Add pause/resume functionality
LK.gui.pauseButton = function () {
	var pauseBtn = new Container();
	var pauseBg = new Graphics();
	pauseBg.beginFill(0x000000, 0.5);
	pauseBg.drawCircle(0, 0, 40);
	pauseBg.endFill();
	pauseBtn.addChild(pauseBg);
	var pauseIcon = new Graphics();
	pauseIcon.beginFill(0xFFFFFF);
	pauseIcon.drawRect(-15, -15, 10, 30);
	pauseIcon.drawRect(5, -15, 10, 30);
	pauseIcon.endFill();
	pauseBtn.addChild(pauseIcon);
	pauseBtn.x = SCREEN_WIDTH - 60;
	pauseBtn.y = 60;
	pauseBtn.interactive = true;
	pauseBtn.down = function () {
		LK.pauseGame();
		showPauseMenu();
	};
	return pauseBtn;
};
// Custom pause menu
function showPauseMenu() {
	var pauseMenu = new Container();
	var overlay = new Graphics();
	overlay.beginFill(0x000000, 0.7);
	overlay.drawRect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
	overlay.endFill();
	pauseMenu.addChild(overlay);
	var title = new Text2("PAUSED", {
		size: 200,
		fill: 0xFFFFFF
	});
	title.anchor.set(0.5, 0.5);
	title.x = SCREEN_WIDTH / 2;
	title.y = SCREEN_HEIGHT / 3;
	pauseMenu.addChild(title);
	var resumeBtn = createButton("RESUME", SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2, function () {
		pauseMenu.destroy();
		LK.resumeGame();
	});
	pauseMenu.addChild(resumeBtn);
	var restartBtn = createButton("RESTART", SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2 + 150, function () {
		pauseMenu.destroy();
		LK.restartGame();
	});
	pauseMenu.addChild(restartBtn);
	LK.gui.addChild(pauseMenu);
}
// Helper function to create buttons
function createButton(text, x, y, callback) {
	var button = new Container();
	var bg = new Graphics();
	bg.beginFill(0x333333);
	bg.lineStyle(4, 0xFFFFFF);
	bg.drawRoundedRect(-150, -40, 300, 80, 10);
	bg.endFill();
	button.addChild(bg);
	var label = new Text2(text, {
		size: 60,
		fill: 0xFFFFFF
	});
	label.anchor.set(0.5, 0.5);
	button.addChild(label);
	button.x = x;
	button.y = y;
	button.interactive = true;
	button.down = function () {
		// Button press effect
		button.scale.set(0.95);
		LK.setTimeout(function () {
			button.scale.set(1);
			if (callback) {
				callback();
			}
		}, 100);
	};
	return button;
}
// Custom game over screen
LK.showGameOver = function () {
	var gameOver = new Container();
	var overlay = new Graphics();
	overlay.beginFill(0x000000, 0.8);
	overlay.drawRect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
	overlay.endFill();
	gameOver.addChild(overlay);
	var title = new Text2("GAME OVER", {
		size: 200,
		fill: 0xFF0000
	});
	title.anchor.set(0.5, 0.5);
	title.x = SCREEN_WIDTH / 2;
	title.y = SCREEN_HEIGHT / 3;
	gameOver.addChild(title);
	var scoreDisplay = new Text2("SCORE: " + LK.getScore(), {
		size: 120,
		fill: 0xFFFFFF
	});
	scoreDisplay.anchor.set(0.5, 0.5);
	scoreDisplay.x = SCREEN_WIDTH / 2;
	scoreDisplay.y = SCREEN_HEIGHT / 2;
	gameOver.addChild(scoreDisplay);
	var waveDisplay = new Text2("WAVES COMPLETED: " + (waveNumber - 1), {
		size: 80,
		fill: 0xFFFFFF
	});
	waveDisplay.anchor.set(0.5, 0.5);
	waveDisplay.x = SCREEN_WIDTH / 2;
	waveDisplay.y = SCREEN_HEIGHT / 2 + 100;
	gameOver.addChild(waveDisplay);
	var restartBtn = createButton("PLAY AGAIN", SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2 + 250, function () {
		gameOver.destroy();
		LK.restartGame();
	});
	gameOver.addChild(restartBtn);
	// Add final explosion particles
	for (var i = 0; i < 10; i++) {
		LK.setTimeout(function () {
			particleSystem.emit(SCREEN_WIDTH / 2 + (Math.random() * 500 - 250), SCREEN_HEIGHT / 2 + (Math.random() * 500 - 250), 30);
		}, i * 200);
	}
	LK.gui.addChild(gameOver);
	LK.pauseGame();
};
// Add a start menu
function showStartMenu() {
	var startMenu = new Container();
	var overlay = new Graphics();
	overlay.beginFill(0x000033, 0.9);
	overlay.drawRect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
	overlay.endFill();
	startMenu.addChild(overlay);
	var title = new Text2("SPACE SHOOTER", {
		size: 200,
		fill: 0x00FFFF
	});
	title.anchor.set(0.5, 0.5);
	title.x = SCREEN_WIDTH / 2;
	title.y = SCREEN_HEIGHT / 3;
	startMenu.addChild(title);
	var startBtn = createButton("START GAME", SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2 + 100, function () {
		startMenu.destroy();
		// Show tutorial message
		showStatusMessage("TAP TO SHOOT, DRAG TO MOVE", 0xFFFFFF);
	});
	startMenu.addChild(startBtn);
	// Add stars effect
	for (var i = 0; i < 50; i++) {
		var star = new Graphics();
		star.beginFill(0xFFFFFF);
		var size = 1 + Math.random() * 3;
		star.drawCircle(0, 0, size);
		star.endFill();
		star.x = Math.random() * SCREEN_WIDTH;
		star.y = Math.random() * SCREEN_HEIGHT;
		star.alpha = 0.3 + Math.random() * 0.7;
		// Twinkle animation
		(function (s) {
			var duration = 1000 + Math.random() * 2000;
			var _animate = function animate() {
				tween(s, {
					alpha: 0.2 + Math.random() * 0.8
				}, {
					duration: duration,
					onFinish: _animate
				});
			};
			_animate();
		})(star);
		startMenu.addChild(star);
	}
	LK.gui.addChild(startMenu);
	LK.pauseGame();
}
// Show start menu on game load
LK.setTimeout(function () {
	showStartMenu();
}, 100);
// Add cheats for debugging
var cheats = {
	invincible: false,
	toggleInvincible: function toggleInvincible() {
		this.invincible = !this.invincible;
		player.invulnerable = this.invincible;
		showStatusMessage("Invincibility: " + (this.invincible ? "ON" : "OFF"), 0xFFFF00);
	},
	addLife: function addLife() {
		player.addLife();
	},
	skipWave: function skipWave() {
		enemyShips.forEach(function (ship) {
			ship.explode();
		});
		enemyShips = [];
		waveInProgress = false;
	},
	activateAllPowerups: function activateAllPowerups() {
		player.setTripleShot(true);
		player.setShield(true);
		player.setSpeedBoost(true);
	}
};
// Uncomment to enable console cheats
/*
LK.console = function(command) {
switch (command) {
case "god":
cheats.toggleInvincible();
break;
case "life":
cheats.addLife();
break;
case "skip":
cheats.skipWave();
break;
case "power":
cheats.activateAllPowerups();
break;
default:
return "Unknown command";
}
return "Command executed: " + command;
};
*/

===================================================================
--- original.js
+++ change.js
@@ -561,10 +561,16 @@
 	SPEED: 'speed',
 	LIFE: 'life'
 };
 function createScrollingBackground() {
-	var bg1 = game.addChild(new Sprite('background'));
-	var bg2 = game.addChild(new Sprite('background'));
+	var bg1 = game.addChild(LK.getAsset('background', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	}));
+	var bg2 = game.addChild(LK.getAsset('background', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	}));
 	bg1.y = 0;
 	bg2.y = -SCREEN_HEIGHT;
 	game.updateBackground = function () {
 		bg1.y += 1;