===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,285 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var EnemyAircraft = Container.expand(function () {
+	var self = Container.call(this);
+	var graphics = self.attachAsset('enemyAircraft', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 2 + Math.random() * 3;
+	self.movePattern = Math.floor(Math.random() * 3); // 0: straight, 1: zigzag, 2: sine wave
+	self.startX = 0;
+	self.fireRate = 60 + Math.random() * 60; // Fire every 60-120 ticks
+	self.lastFire = 0;
+	self.update = function () {
+		// Movement patterns
+		if (self.movePattern === 0) {
+			// Straight down
+			self.y += self.speed;
+		} else if (self.movePattern === 1) {
+			// Zigzag pattern
+			self.y += self.speed;
+			self.x = self.startX + Math.sin(self.y * 0.01) * 100;
+		} else if (self.movePattern === 2) {
+			// Sine wave pattern
+			self.y += self.speed;
+			self.x = self.startX + Math.sin(self.y * 0.02) * 150;
+		}
+		// Fire bullets occasionally
+		if (LK.ticks - self.lastFire >= self.fireRate) {
+			self.fireBullet();
+			self.lastFire = LK.ticks;
+			self.fireRate = 60 + Math.random() * 60; // Randomize next fire time
+		}
+	};
+	self.fireBullet = function () {
+		var bullet = new EnemyBullet();
+		bullet.x = self.x;
+		bullet.y = self.y + 40;
+		enemyBullets.push(bullet);
+		game.addChild(bullet);
+	};
+	return self;
+});
+var EnemyBullet = Container.expand(function () {
+	var self = Container.call(this);
+	var graphics = self.attachAsset('enemyBullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 4;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+var PlayerAircraft = Container.expand(function () {
+	var self = Container.call(this);
+	var graphics = self.attachAsset('playerAircraft', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.health = 1;
+	self.fireRate = 15; // Fire every 15 ticks
+	self.lastFire = 0;
+	self.update = function () {
+		// Auto-fire bullets
+		if (LK.ticks - self.lastFire >= self.fireRate) {
+			self.fireBullet();
+			self.lastFire = LK.ticks;
+		}
+	};
+	self.fireBullet = function () {
+		var bullet = new PlayerBullet();
+		bullet.x = self.x;
+		bullet.y = self.y - 50;
+		playerBullets.push(bullet);
+		game.addChild(bullet);
+		LK.getSound('shoot').play();
+	};
+	return self;
+});
+var PlayerBullet = Container.expand(function () {
+	var self = Container.call(this);
+	var graphics = self.attachAsset('playerBullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -8;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+var PowerUp = Container.expand(function () {
+	var self = Container.call(this);
+	var graphics = self.attachAsset('powerUp', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 3;
+	self.rotationSpeed = 0.1;
+	self.update = function () {
+		self.y += self.speed;
+		self.rotation += self.rotationSpeed;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
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+	backgroundColor: 0x001122
+});
+
+/**** 
+* Game Code
+****/ 
+// Game variables
+var player;
+var enemies = [];
+var playerBullets = [];
+var enemyBullets = [];
+var powerUps = [];
+var enemySpawnRate = 120; // Spawn enemy every 120 ticks initially
+var powerUpSpawnRate = 600; // Spawn power-up every 600 ticks
+var difficultyTimer = 0;
+var dragNode = null;
+// UI Setup
+var scoreTxt = new Text2('Score: 0', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Initialize player
+player = new PlayerAircraft();
+player.x = 1024; // Center horizontally
+player.y = 2400; // Near bottom of screen
+game.addChild(player);
+// Game input handlers
+game.down = function (x, y, obj) {
+	dragNode = player;
+	player.x = x;
+	player.y = y;
+};
+game.move = function (x, y, obj) {
+	if (dragNode) {
+		dragNode.x = Math.max(60, Math.min(1988, x)); // Keep within screen bounds
+		dragNode.y = Math.max(200, Math.min(2600, y)); // Keep within reasonable bounds
+	}
+};
+game.up = function (x, y, obj) {
+	dragNode = null;
+};
+// Spawn enemy aircraft
+function spawnEnemy() {
+	var enemy = new EnemyAircraft();
+	enemy.x = 200 + Math.random() * 1648; // Random x position
+	enemy.y = -50; // Start above screen
+	enemy.startX = enemy.x;
+	enemies.push(enemy);
+	game.addChild(enemy);
+}
+// Spawn power-up
+function spawnPowerUp() {
+	var powerUp = new PowerUp();
+	powerUp.x = 200 + Math.random() * 1648;
+	powerUp.y = -50;
+	powerUps.push(powerUp);
+	game.addChild(powerUp);
+}
+// Main game update loop
+game.update = function () {
+	difficultyTimer++;
+	// Increase difficulty over time
+	if (difficultyTimer % 1800 === 0) {
+		// Every 30 seconds
+		enemySpawnRate = Math.max(40, enemySpawnRate - 10);
+	}
+	// Spawn enemies
+	if (LK.ticks % enemySpawnRate === 0) {
+		spawnEnemy();
+	}
+	// Spawn power-ups
+	if (LK.ticks % powerUpSpawnRate === 0) {
+		spawnPowerUp();
+	}
+	// Update and check player bullets
+	for (var i = playerBullets.length - 1; i >= 0; i--) {
+		var bullet = playerBullets[i];
+		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
+		// Remove bullets that go off screen
+		if (bullet.lastY >= -30 && bullet.y < -30) {
+			bullet.destroy();
+			playerBullets.splice(i, 1);
+			continue;
+		}
+		// Check collision with enemies
+		var hitEnemy = false;
+		for (var e = enemies.length - 1; e >= 0; e--) {
+			if (bullet.intersects(enemies[e])) {
+				LK.setScore(LK.getScore() + 100);
+				scoreTxt.setText('Score: ' + LK.getScore());
+				// Flash effect on enemy hit
+				LK.effects.flashObject(enemies[e], 0xFFFFFF, 200);
+				LK.getSound('enemyHit').play();
+				enemies[e].destroy();
+				enemies.splice(e, 1);
+				bullet.destroy();
+				playerBullets.splice(i, 1);
+				hitEnemy = true;
+				break;
+			}
+		}
+		if (hitEnemy) continue;
+		bullet.lastY = bullet.y;
+	}
+	// Update and check enemy bullets
+	for (var i = enemyBullets.length - 1; i >= 0; i--) {
+		var bullet = enemyBullets[i];
+		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
+		// Remove bullets that go off screen
+		if (bullet.lastY <= 2762 && bullet.y > 2762) {
+			bullet.destroy();
+			enemyBullets.splice(i, 1);
+			continue;
+		}
+		// Check collision with player
+		if (bullet.intersects(player)) {
+			LK.effects.flashScreen(0xFF0000, 1000);
+			LK.showGameOver();
+			return;
+		}
+		bullet.lastY = bullet.y;
+	}
+	// Update and check enemies
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		var enemy = enemies[i];
+		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
+		// Remove enemies that go off screen
+		if (enemy.lastY <= 2762 && enemy.y > 2762) {
+			enemy.destroy();
+			enemies.splice(i, 1);
+			continue;
+		}
+		// Check collision with player
+		if (enemy.intersects(player)) {
+			LK.effects.flashScreen(0xFF0000, 1000);
+			LK.showGameOver();
+			return;
+		}
+		enemy.lastY = enemy.y;
+	}
+	// Update and check power-ups
+	for (var i = powerUps.length - 1; i >= 0; i--) {
+		var powerUp = powerUps[i];
+		if (powerUp.lastY === undefined) powerUp.lastY = powerUp.y;
+		// Remove power-ups that go off screen
+		if (powerUp.lastY <= 2762 && powerUp.y > 2762) {
+			powerUp.destroy();
+			powerUps.splice(i, 1);
+			continue;
+		}
+		// Check collision with player
+		if (powerUp.intersects(player)) {
+			LK.setScore(LK.getScore() + 50);
+			scoreTxt.setText('Score: ' + LK.getScore());
+			// Reduce player fire rate for power-up effect
+			player.fireRate = Math.max(5, player.fireRate - 2);
+			LK.getSound('powerUpCollect').play();
+			LK.effects.flashObject(player, 0x00FF00, 500);
+			powerUp.destroy();
+			powerUps.splice(i, 1);
+			continue;
+		}
+		powerUp.lastY = powerUp.y;
+	}
+};
\ No newline at end of file