===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,264 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Coin = Container.expand(function () {
+	var self = Container.call(this);
+	var coinGraphics = self.attachAsset('coin', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 3;
+	self.update = function () {
+		self.y += self.speed;
+		self.rotation += 0.1;
+	};
+	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.shootTimer = 0;
+	self.shootDelay = 60 + Math.random() * 60;
+	self.direction = Math.random() < 0.5 ? -1 : 1;
+	self.update = function () {
+		self.y += self.speed;
+		self.x += self.direction * 1;
+		if (self.x < 50 || self.x > 1998) {
+			self.direction *= -1;
+		}
+		self.shootTimer++;
+		if (self.shootTimer >= self.shootDelay) {
+			self.shootTimer = 0;
+			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 bulletGraphics = self.attachAsset('enemyBullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 8;
+	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
+	});
+	return self;
+});
+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;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x8B7355
+});
+
+/**** 
+* Game Code
+****/ 
+var player = game.addChild(new Player());
+player.x = 1024;
+player.y = 2400;
+var playerBullets = [];
+var enemies = [];
+var enemyBullets = [];
+var coins = [];
+var dragNode = null;
+var waveNumber = 1;
+var enemiesKilled = 0;
+var enemiesPerWave = 3;
+var scoreTxt = new Text2('Score: 0', {
+	size: 80,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+var waveTxt = new Text2('Wave: 1', {
+	size: 60,
+	fill: 0xFFDD44
+});
+waveTxt.anchor.set(0, 0);
+waveTxt.x = 150;
+waveTxt.y = 0;
+LK.gui.topLeft.addChild(waveTxt);
+function updateScore() {
+	scoreTxt.setText('Score: ' + LK.getScore());
+}
+function updateWave() {
+	waveTxt.setText('Wave: ' + waveNumber);
+}
+function spawnEnemy() {
+	var enemy = new Enemy();
+	enemy.x = Math.random() * 1800 + 124;
+	enemy.y = -50;
+	enemy.speed = 1 + waveNumber * 0.5;
+	enemies.push(enemy);
+	game.addChild(enemy);
+}
+function spawnWave() {
+	for (var i = 0; i < enemiesPerWave; i++) {
+		LK.setTimeout(function () {
+			spawnEnemy();
+		}, i * 1000);
+	}
+}
+function handleMove(x, y, obj) {
+	if (dragNode) {
+		dragNode.x = Math.max(40, Math.min(2008, x));
+		dragNode.y = Math.max(100, Math.min(2632, y));
+	}
+}
+game.move = handleMove;
+game.down = function (x, y, obj) {
+	if (obj === player) {
+		dragNode = player;
+		handleMove(x, y, obj);
+	} else {
+		var bullet = new PlayerBullet();
+		bullet.x = player.x;
+		bullet.y = player.y - 40;
+		playerBullets.push(bullet);
+		game.addChild(bullet);
+		LK.getSound('shoot').play();
+	}
+};
+game.up = function (x, y, obj) {
+	dragNode = null;
+};
+spawnWave();
+game.update = function () {
+	// Update player bullets
+	for (var i = playerBullets.length - 1; i >= 0; i--) {
+		var bullet = playerBullets[i];
+		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
+		if (bullet.lastY >= -10 && bullet.y < -10) {
+			bullet.destroy();
+			playerBullets.splice(i, 1);
+			continue;
+		}
+		// Check collision with enemies
+		for (var j = enemies.length - 1; j >= 0; j--) {
+			var enemy = enemies[j];
+			if (bullet.intersects(enemy)) {
+				LK.setScore(LK.getScore() + 10);
+				updateScore();
+				enemiesKilled++;
+				// Drop coin
+				var coin = new Coin();
+				coin.x = enemy.x;
+				coin.y = enemy.y;
+				coins.push(coin);
+				game.addChild(coin);
+				LK.getSound('enemyHit').play();
+				LK.effects.flashObject(enemy, 0xFF0000, 200);
+				bullet.destroy();
+				playerBullets.splice(i, 1);
+				enemy.destroy();
+				enemies.splice(j, 1);
+				break;
+			}
+		}
+		bullet.lastY = bullet.y;
+	}
+	// Update enemy bullets
+	for (var i = enemyBullets.length - 1; i >= 0; i--) {
+		var bullet = enemyBullets[i];
+		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
+		if (bullet.lastY <= 2742 && bullet.y > 2742) {
+			bullet.destroy();
+			enemyBullets.splice(i, 1);
+			continue;
+		}
+		// Check collision with player
+		if (bullet.intersects(player)) {
+			LK.getSound('playerHit').play();
+			LK.effects.flashScreen(0xFF0000, 1000);
+			LK.showGameOver();
+			return;
+		}
+		bullet.lastY = bullet.y;
+	}
+	// Update enemies
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		var enemy = enemies[i];
+		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
+		if (enemy.lastY <= 2742 && enemy.y > 2742) {
+			enemy.destroy();
+			enemies.splice(i, 1);
+			continue;
+		}
+		// Check collision with player
+		if (enemy.intersects(player)) {
+			LK.getSound('playerHit').play();
+			LK.effects.flashScreen(0xFF0000, 1000);
+			LK.showGameOver();
+			return;
+		}
+		enemy.lastY = enemy.y;
+	}
+	// Update coins
+	for (var i = coins.length - 1; i >= 0; i--) {
+		var coin = coins[i];
+		if (coin.lastY === undefined) coin.lastY = coin.y;
+		if (coin.lastY <= 2742 && coin.y > 2742) {
+			coin.destroy();
+			coins.splice(i, 1);
+			continue;
+		}
+		// Check collision with player
+		if (coin.intersects(player)) {
+			LK.setScore(LK.getScore() + 5);
+			updateScore();
+			LK.getSound('coinCollect').play();
+			LK.effects.flashObject(coin, 0xFFFFFF, 300);
+			coin.destroy();
+			coins.splice(i, 1);
+			continue;
+		}
+		coin.lastY = coin.y;
+	}
+	// Check if wave is complete
+	if (enemies.length === 0 && enemiesKilled >= enemiesPerWave) {
+		waveNumber++;
+		enemiesPerWave = Math.min(8, 3 + Math.floor(waveNumber / 2));
+		updateWave();
+		enemiesKilled = 0;
+		LK.setTimeout(function () {
+			spawnWave();
+		}, 2000);
+	}
+};
\ No newline at end of file