===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,203 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Bullet = Container.expand(function () {
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -15;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+var Enemy = Container.expand(function () {
+	var self = Container.call(this);
+	var enemyGraphics = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 2;
+	self.health = 1;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.maxHealth = 100;
+	self.health = 100;
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x1a1a2e
+});
+
+/**** 
+* Game Code
+****/ 
+var player = game.addChild(new Player());
+player.x = 2048 / 2;
+player.y = 2550;
+var enemies = [];
+var bullets = [];
+var waveNumber = 1;
+var enemiesInWave = 5;
+var enemiesKilled = 0;
+var currentWaveEnemies = 0;
+var healthText = new Text2(player.health.toString(), {
+	size: 80,
+	fill: 0x00FF00
+});
+healthText.anchor.set(0, 0);
+LK.gui.topRight.addChild(healthText);
+var scoreText = new Text2('0', {
+	size: 80,
+	fill: 0xFFFFFF
+});
+scoreText.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreText);
+var waveText = new Text2('Wave ' + waveNumber, {
+	size: 60,
+	fill: 0xFFFF00
+});
+waveText.anchor.set(1, 0);
+LK.gui.topRight.addChild(waveText);
+var spawnTimer = 0;
+var spawnInterval = 60;
+var waveComplete = false;
+LK.playMusic('bgmusic', {
+	loop: true
+});
+function spawnEnemy() {
+	var newEnemy = game.addChild(new Enemy());
+	var spawnX = Math.random() * (2048 - 100) + 50;
+	newEnemy.x = spawnX;
+	newEnemy.y = -50;
+	newEnemy.lastY = newEnemy.y;
+	newEnemy.lastIntersecting = false;
+	enemies.push(newEnemy);
+	currentWaveEnemies++;
+}
+function startNewWave() {
+	waveNumber++;
+	enemiesInWave = Math.floor(5 + waveNumber * 1.5);
+	currentWaveEnemies = 0;
+	waveComplete = false;
+	spawnTimer = 0;
+	spawnInterval = Math.max(30, 60 - waveNumber * 3);
+	waveText.setText('Wave ' + waveNumber);
+}
+game.move = function (x, y, obj) {
+	player.x = x;
+	if (player.x < 40) player.x = 40;
+	if (player.x > 2008) player.x = 2008;
+};
+game.down = function (x, y, obj) {
+	var newBullet = game.addChild(new Bullet());
+	newBullet.x = player.x;
+	newBullet.y = player.y - 50;
+	newBullet.lastY = newBullet.y;
+	bullets.push(newBullet);
+	LK.getSound('shoot').play();
+};
+game.update = function () {
+	// Spawn enemies for current wave
+	if (!waveComplete && currentWaveEnemies < enemiesInWave) {
+		spawnTimer++;
+		if (spawnTimer >= spawnInterval) {
+			spawnEnemy();
+			spawnTimer = 0;
+		}
+	}
+	// Update and manage bullets
+	for (var b = bullets.length - 1; b >= 0; b--) {
+		var bullet = bullets[b];
+		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
+		if (bullet.y < -30) {
+			bullet.destroy();
+			bullets.splice(b, 1);
+			continue;
+		}
+		bullet.lastY = bullet.y;
+	}
+	// Update and manage enemies
+	for (var e = enemies.length - 1; e >= 0; e--) {
+		var enemy = enemies[e];
+		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
+		if (enemy.lastIntersecting === undefined) enemy.lastIntersecting = false;
+		// Enemy reached player
+		if (enemy.lastY < 2650 && enemy.y >= 2650) {
+			player.health -= 10;
+			healthText.setText(player.health.toString());
+			LK.getSound('damage').play();
+			if (player.health <= 0) {
+				LK.showGameOver();
+			}
+			enemy.destroy();
+			enemies.splice(e, 1);
+			continue;
+		}
+		// Check bullet collisions
+		var bulletHit = false;
+		for (var b = bullets.length - 1; b >= 0; b--) {
+			var bullet = bullets[b];
+			if (enemy.intersects(bullet)) {
+				bulletHit = true;
+				bullet.destroy();
+				bullets.splice(b, 1);
+				break;
+			}
+		}
+		if (bulletHit) {
+			enemy.health--;
+			if (enemy.health <= 0) {
+				LK.effects.flashObject(enemy, 0xffff00, 100);
+				LK.getSound('hit').play();
+				LK.setScore(LK.getScore() + 1);
+				scoreText.setText(LK.getScore().toString());
+				enemiesKilled++;
+				enemy.destroy();
+				enemies.splice(e, 1);
+				continue;
+			}
+		}
+		enemy.lastY = enemy.y;
+	}
+	// Check if wave is complete
+	if (!waveComplete && currentWaveEnemies >= enemiesInWave && enemies.length === 0) {
+		waveComplete = true;
+		if (LK.getScore() >= 50) {
+			LK.showYouWin();
+		} else {
+			LK.setTimeout(function () {
+				startNewWave();
+			}, 1000);
+		}
+	}
+	// Increase difficulty over time
+	if (enemies.length > 0) {
+		for (var i = 0; i < enemies.length; i++) {
+			var speedIncrease = 0.5 + waveNumber * 0.2;
+			if (enemies[i].speed !== speedIncrease) {
+				enemies[i].speed = speedIncrease;
+			}
+		}
+	}
+};
\ No newline at end of file