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

/**** 
* Classes
****/ 
// Class for enemy ships with wave-based spawning and better animation
var EnemyShip = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemyShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Spawn animation: Fade in & Scale up
	enemyGraphics.scale.set(0);
	enemyGraphics.alpha = 0;
	tween(enemyGraphics.scale, {
		x: 1,
		y: 1
	}, {
		duration: 500
	});
	tween(enemyGraphics, {
		alpha: 1
	}, {
		duration: 500
	});
	self.speed = 3 + Math.random() * 2; // Slight variation in speed
	self.driftAmount = 3; // Side drift range
	self.driftSpeed = 50 + Math.random() * 20; // Slight variation in drift speed
	self.health = 1; // Basic enemies have 1 health
	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
				});
			}
		});
		return false; // Enemy still alive
	};
	self.explode = function () {
		self.destroy();
		enemyShips.splice(enemyShips.indexOf(self), 1);
		// Add score
		increaseScore(self.scoreValue || 1);
	};
	self.update = function () {
		self.y += self.speed;
		self.x += Math.sin(LK.ticks / self.driftSpeed) * self.driftAmount;
		// Destroy if off-screen with fade-out effect
		if (self.y > 2732 + 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;
});
// Class for tougher enemy ships
var BossEnemy = EnemyShip.expand(function () {
	var self = EnemyShip.call(this);
	// Make boss larger
	self.getChildAt(0).scale.set(1.5);
	// Make boss tougher
	self.health = 5;
	self.speed = 1.5;
	self.scoreValue = 5;
	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;
		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
	});
	self.speed = 10;
	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.shoot = function () {
		if (self.canShoot) {
			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;
		}
		self.lives--;
		updateLivesDisplay();
		if (self.lives <= 0) {
			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);
	};
	self.update = function () {
		if (self.invulnerable) {
			return;
		}
		for (var i = 0; i < enemyShips.length; i++) {
			if (self.intersects(enemyShips[i])) {
				self.hit();
				enemyShips[i].explode();
				break;
			}
		}
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Using bullet as placeholder - replace with proper explosion
/**** 
* Game Variables
****/ 
var playerBullets = [];
var enemyShips = [];
var player = game.addChild(new PlayerShip());
player.x = 2048 / 2;
player.y = 2732 - 200;
// Score Display
var scoreText = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0.5, 0);
scoreText.x = 2048 / 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 = 2048 - 50;
waveText.y = 50;
LK.gui.top.addChild(waveText);
// 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 to spawn enemies in waves
function spawnEnemy() {
	if (!waveInProgress || waveCooldown) {
		return;
	}
	if (enemiesSpawned < enemiesPerWave) {
		var enemy;
		// Every 3 waves, add a boss
		if (waveNumber > 0 && waveNumber % 3 === 0 && enemiesSpawned === enemiesPerWave - 1) {
			enemy = new BossEnemy();
		} else {
			enemy = new EnemyShip();
		}
		enemy.x = Math.random() * 2048;
		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 = 2048 / 2;
	newWaveText.y = 2732 / 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();
				}
			});
		}
	});
}
// Game update loop
game.update = function () {
	// Update player
	player.update();
	// Update player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		if (playerBullets[i]) {
			playerBullets[i].update();
		}
	}
	// Update enemy ships
	for (var j = enemyShips.length - 1; j >= 0; j--) {
		if (enemyShips[j]) {
			enemyShips[j].update();
		}
	}
	// Check for collisions between player bullets and enemy ships
	for (var k = playerBullets.length - 1; k >= 0; k--) {
		if (!playerBullets[k]) {
			continue;
		}
		for (var l = enemyShips.length - 1; l >= 0; l--) {
			if (!enemyShips[l]) {
				continue;
			}
			if (playerBullets[k] && enemyShips[l] && playerBullets[k].intersects(enemyShips[l])) {
				// Enemy hit by bullet
				var destroyed = enemyShips[l].hit();
				// Remove bullet
				playerBullets[k].destroy();
				playerBullets.splice(k, 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) {
	// Constrain player to screen boundaries
	if (player.children.length > 0) {
		var halfWidth = player.getChildAt(0).width / 2;
	} else {
		var halfWidth = 0; // Default to 0 if no children
	}
	player.x = Math.min(Math.max(x, halfWidth), 2048 - halfWidth);
};
// Handle shooting
game.down = function (x, y, obj) {
	player.shoot();
};

===================================================================
--- original.js
+++ change.js
@@ -52,25 +52,12 @@
 		});
 		return false; // Enemy still alive
 	};
 	self.explode = function () {
-		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.destroy();
+		enemyShips.splice(enemyShips.indexOf(self), 1);
+		// Add score
+		increaseScore(self.scoreValue || 1);
 	};
 	self.update = function () {
 		self.y += self.speed;
 		self.x += Math.sin(LK.ticks / self.driftSpeed) * self.driftAmount;