===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,190 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	return self;
+});
+var Zombie = Container.expand(function () {
+	var self = Container.call(this);
+	var zombieGraphics = self.attachAsset('zombie', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 1.5;
+	self.targetX = 1024;
+	self.targetY = 1366;
+	self.isDestroyed = false;
+	self.update = function () {
+		if (self.isDestroyed) return;
+		// Move toward center
+		var dx = self.targetX - self.x;
+		var dy = self.targetY - self.y;
+		var distance = Math.sqrt(dx * dx + dy * dy);
+		if (distance > 5) {
+			self.x += dx / distance * self.speed;
+			self.y += dy / distance * self.speed;
+		}
+	};
+	self.down = function (x, y, obj) {
+		if (self.isDestroyed) return;
+		self.isDestroyed = true;
+		LK.setScore(LK.getScore() + 10);
+		scoreTxt.setText(LK.getScore());
+		// Create explosion effect
+		var explosion = game.addChild(LK.getAsset('explosion', {
+			anchorX: 0.5,
+			anchorY: 0.5,
+			x: self.x,
+			y: self.y,
+			scaleX: 0.1,
+			scaleY: 0.1
+		}));
+		// Animate explosion
+		tween(explosion, {
+			scaleX: 2,
+			scaleY: 2,
+			alpha: 0
+		}, {
+			duration: 300,
+			easing: tween.easeOut,
+			onFinish: function onFinish() {
+				explosion.destroy();
+			}
+		});
+		LK.getSound('zombieHit').play();
+		// Mark for removal
+		for (var i = 0; i < zombies.length; i++) {
+			if (zombies[i] === self) {
+				zombies[i].shouldRemove = true;
+				break;
+			}
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
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+	backgroundColor: 0x2F4F4F
+});
+
+/**** 
+* Game Code
+****/ 
+// Game variables
+var zombies = [];
+var player;
+var scoreTxt;
+var waveLevel = 1;
+var zombieSpawnRate = 120; // Spawn every 2 seconds initially
+var zombieSpeed = 1.5;
+var lastZombieSpawn = 0;
+// Create player at center
+player = game.addChild(new Player());
+player.x = 1024;
+player.y = 1366;
+// Create score display
+scoreTxt = new Text2('0', {
+	size: 100,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+scoreTxt.y = 100;
+// Wave level display
+var waveTxt = new Text2('Wave 1', {
+	size: 60,
+	fill: 0xFFFF00
+});
+waveTxt.anchor.set(0, 0);
+LK.gui.topRight.addChild(waveTxt);
+waveTxt.x = -200;
+waveTxt.y = 50;
+function spawnZombie() {
+	var zombie = new Zombie();
+	// Random spawn from edges
+	var edge = Math.floor(Math.random() * 4);
+	switch (edge) {
+		case 0:
+			// Top
+			zombie.x = Math.random() * 2048;
+			zombie.y = -40;
+			break;
+		case 1:
+			// Right
+			zombie.x = 2088;
+			zombie.y = Math.random() * 2732;
+			break;
+		case 2:
+			// Bottom
+			zombie.x = Math.random() * 2048;
+			zombie.y = 2772;
+			break;
+		case 3:
+			// Left
+			zombie.x = -40;
+			zombie.y = Math.random() * 2732;
+			break;
+	}
+	zombie.speed = zombieSpeed;
+	zombies.push(zombie);
+	game.addChild(zombie);
+	LK.getSound('zombieSpawn').play();
+}
+function checkGameOver() {
+	for (var i = 0; i < zombies.length; i++) {
+		var zombie = zombies[i];
+		if (zombie.isDestroyed) continue;
+		var dx = zombie.x - player.x;
+		var dy = zombie.y - player.y;
+		var distance = Math.sqrt(dx * dx + dy * dy);
+		if (distance < 50) {
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.showGameOver();
+			return;
+		}
+	}
+}
+function updateWave() {
+	var currentScore = LK.getScore();
+	var newWaveLevel = Math.floor(currentScore / 100) + 1;
+	if (newWaveLevel > waveLevel) {
+		waveLevel = newWaveLevel;
+		waveTxt.setText('Wave ' + waveLevel);
+		// Increase difficulty
+		zombieSpawnRate = Math.max(30, zombieSpawnRate - 10);
+		zombieSpeed += 0.3;
+		LK.effects.flashScreen(0x00ff00, 500);
+	}
+}
+game.update = function () {
+	// Spawn zombies
+	if (LK.ticks - lastZombieSpawn > zombieSpawnRate) {
+		spawnZombie();
+		lastZombieSpawn = LK.ticks;
+	}
+	// Clean up destroyed zombies
+	for (var i = zombies.length - 1; i >= 0; i--) {
+		var zombie = zombies[i];
+		if (zombie.shouldRemove) {
+			zombie.destroy();
+			zombies.splice(i, 1);
+		}
+	}
+	// Check for game over
+	checkGameOver();
+	// Update wave progression
+	updateWave();
+};
\ No newline at end of file