===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,280 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// Enemy type 1: moves straight down
+var Enemy1 = Container.expand(function () {
+	var self = Container.call(this);
+	var enemySprite = self.attachAsset('enemy1', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 8 + Math.random() * 4;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+// Enemy type 2: moves in sine wave
+var Enemy2 = Container.expand(function () {
+	var self = Container.call(this);
+	var enemySprite = self.attachAsset('enemy2', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 7 + Math.random() * 3;
+	self.waveAmplitude = 120 + Math.random() * 80;
+	self.waveSpeed = 0.02 + Math.random() * 0.01;
+	self.baseX = 0;
+	self.t = 0;
+	self.update = function () {
+		self.y += self.speed;
+		self.t += self.waveSpeed;
+		self.x = self.baseX + Math.sin(self.t * 6.28) * self.waveAmplitude;
+	};
+	return self;
+});
+// Enemy bullet class
+var EnemyBullet = Container.expand(function () {
+	var self = Container.call(this);
+	var bulletSprite = self.attachAsset('enemyBullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speedX = 0;
+	self.speedY = 16;
+	self.update = function () {
+		self.x += self.speedX;
+		self.y += self.speedY;
+	};
+	return self;
+});
+// Hero class
+var Hero = Container.expand(function () {
+	var self = Container.call(this);
+	var heroSprite = self.attachAsset('hero', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.radius = heroSprite.width / 2;
+	self.shootCooldown = 0;
+	self.update = function () {
+		if (self.shootCooldown > 0) self.shootCooldown--;
+	};
+	return self;
+});
+// Hero bullet class
+var HeroBullet = Container.expand(function () {
+	var self = Container.call(this);
+	var bulletSprite = self.attachAsset('heroBullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -32;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x181818
+});
+
+/**** 
+* Game Code
+****/ 
+// Music
+// Sound for shooting
+// Enemy bullet: orange ellipse
+// Enemy type 2: green ellipse
+// Enemy type 1: red box
+// Hero bullet: yellow ellipse
+// Hero asset: blue box
+// Play background music
+LK.playMusic('bgmusic');
+// Score display
+var scoreTxt = new Text2('0', {
+	size: 120,
+	fill: "#fff"
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Game variables
+var hero = new Hero();
+game.addChild(hero);
+hero.x = 2048 / 2;
+hero.y = 2732 - 350;
+var heroBullets = [];
+var enemies = [];
+var enemyBullets = [];
+var dragNode = null;
+var lastHeroIntersecting = false;
+var score = 0;
+var spawnTick = 0;
+var enemyShootTick = 0;
+// Helper: spawn enemy
+function spawnEnemy() {
+	var type = Math.random() < 0.5 ? 1 : 2;
+	var enemy;
+	if (type === 1) {
+		enemy = new Enemy1();
+		enemy.x = 200 + Math.random() * (2048 - 400);
+		enemy.y = -80;
+	} else {
+		enemy = new Enemy2();
+		enemy.baseX = 200 + Math.random() * (2048 - 400);
+		enemy.x = enemy.baseX;
+		enemy.y = -80;
+		enemy.t = Math.random() * 2;
+	}
+	enemies.push(enemy);
+	game.addChild(enemy);
+}
+// Helper: spawn enemy bullet
+function spawnEnemyBullet(enemy, targetX, targetY) {
+	var bullet = new EnemyBullet();
+	bullet.x = enemy.x;
+	bullet.y = enemy.y + 60;
+	// Aim at hero
+	var dx = targetX - bullet.x;
+	var dy = targetY - bullet.y;
+	var len = Math.sqrt(dx * dx + dy * dy);
+	if (len > 0) {
+		bullet.speedX = dx / len * 18;
+		bullet.speedY = dy / len * 18;
+	}
+	enemyBullets.push(bullet);
+	game.addChild(bullet);
+	LK.getSound('enemyShoot').play();
+}
+// Move handler for dragging hero
+function handleMove(x, y, obj) {
+	if (dragNode) {
+		// Clamp hero inside screen
+		var hw = dragNode.width / 2;
+		var hh = dragNode.height / 2;
+		var nx = Math.max(hw, Math.min(2048 - hw, x));
+		var ny = Math.max(hh + 100, Math.min(2732 - hh, y));
+		dragNode.x = nx;
+		dragNode.y = ny;
+	}
+}
+// Touch down: start dragging hero
+game.down = function (x, y, obj) {
+	// Only allow drag if touch is on hero
+	var local = hero.toLocal(game.toGlobal({
+		x: x,
+		y: y
+	}));
+	if (Math.abs(local.x) <= hero.width / 2 && Math.abs(local.y) <= hero.height / 2) {
+		dragNode = hero;
+	}
+};
+// Touch up: stop dragging
+game.up = function (x, y, obj) {
+	dragNode = null;
+};
+// Touch move: move hero
+game.move = function (x, y, obj) {
+	handleMove(x, y, obj);
+};
+// Main game update
+game.update = function () {
+	// Update hero
+	hero.update();
+	// Hero shooting (auto-fire)
+	if (hero.shootCooldown <= 0) {
+		var bullet = new HeroBullet();
+		bullet.x = hero.x;
+		bullet.y = hero.y - hero.height / 2 - 20;
+		heroBullets.push(bullet);
+		game.addChild(bullet);
+		hero.shootCooldown = 10;
+		LK.getSound('shoot').play();
+	}
+	// Update hero bullets
+	for (var i = heroBullets.length - 1; i >= 0; i--) {
+		var b = heroBullets[i];
+		b.update();
+		// Remove if off screen
+		if (b.y < -60) {
+			b.destroy();
+			heroBullets.splice(i, 1);
+			continue;
+		}
+		// Check collision with enemies
+		for (var j = enemies.length - 1; j >= 0; j--) {
+			var e = enemies[j];
+			if (b.intersects(e)) {
+				// Enemy hit
+				LK.getSound('enemyHit').play();
+				score += 1;
+				scoreTxt.setText(score);
+				// Flash enemy
+				LK.effects.flashObject(e, 0xffffff, 200);
+				// Remove both
+				b.destroy();
+				heroBullets.splice(i, 1);
+				e.destroy();
+				enemies.splice(j, 1);
+				break;
+			}
+		}
+	}
+	// Update enemies
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		var e = enemies[i];
+		e.update();
+		// Remove if off screen
+		if (e.y > 2732 + 100) {
+			e.destroy();
+			enemies.splice(i, 1);
+			continue;
+		}
+		// Enemy shoots randomly
+		if (Math.random() < 0.008) {
+			spawnEnemyBullet(e, hero.x, hero.y);
+		}
+		// Check collision with hero
+		if (e.intersects(hero)) {
+			// Hero hit
+			LK.getSound('heroHit').play();
+			LK.effects.flashScreen(0xff0000, 800);
+			LK.showGameOver();
+			return;
+		}
+	}
+	// Update enemy bullets
+	for (var i = enemyBullets.length - 1; i >= 0; i--) {
+		var b = enemyBullets[i];
+		b.update();
+		// Remove if off screen
+		if (b.y < -60 || b.y > 2732 + 60 || b.x < -60 || b.x > 2048 + 60) {
+			b.destroy();
+			enemyBullets.splice(i, 1);
+			continue;
+		}
+		// Check collision with hero
+		if (b.intersects(hero)) {
+			LK.getSound('heroHit').play();
+			LK.effects.flashScreen(0xff0000, 800);
+			LK.showGameOver();
+			return;
+		}
+	}
+	// Spawn enemies
+	spawnTick++;
+	var spawnInterval = Math.max(18, 60 - Math.floor(score / 10) * 4); // Faster as score increases
+	if (spawnTick >= spawnInterval) {
+		spawnEnemy();
+		spawnTick = 0;
+	}
+};
\ No newline at end of file