===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,407 @@
-/****
+/**** 
+* 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.damage = car.damage;
+	self.update = function () {
+		self.y -= self.speed;
+		// Remove if off screen
+		if (self.y < -50) {
+			self.destroy();
+			for (var i = bullets.length - 1; i >= 0; i--) {
+				if (bullets[i] === self) {
+					bullets.splice(i, 1);
+					break;
+				}
+			}
+		}
+		// Check collision with zombies
+		for (var i = zombies.length - 1; i >= 0; i--) {
+			var zombie = zombies[i];
+			if (self.intersects(zombie)) {
+				zombie.takeDamage(self.damage);
+				self.destroy();
+				for (var j = bullets.length - 1; j >= 0; j--) {
+					if (bullets[j] === self) {
+						bullets.splice(j, 1);
+						break;
+					}
+				}
+				break;
+			}
+		}
+	};
+	return self;
+});
+var Car = Container.expand(function () {
+	var self = Container.call(this);
+	var carGraphics = self.attachAsset('car', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 8;
+	self.maxHealth = 100;
+	self.health = self.maxHealth;
+	self.armor = 0;
+	self.damage = 20;
+	self.fireRate = 30;
+	self.fireTimer = 0;
+	self.moveSpeed = 12;
+	self.update = function () {
+		if (self.fireTimer > 0) {
+			self.fireTimer--;
+		}
+		// Auto-fire bullets
+		if (self.fireTimer <= 0) {
+			self.fireBullet();
+			self.fireTimer = self.fireRate;
+		}
+	};
+	self.fireBullet = function () {
+		var bullet = new Bullet();
+		bullet.x = self.x;
+		bullet.y = self.y - 100;
+		bullets.push(bullet);
+		game.addChild(bullet);
+		LK.getSound('shoot').play();
+	};
+	self.takeDamage = function (damage) {
+		var actualDamage = Math.max(1, damage - self.armor);
+		self.health -= actualDamage;
+		LK.effects.flashObject(self, 0xff0000, 300);
+		LK.getSound('hit').play();
+		if (self.health <= 0) {
+			LK.showGameOver();
+		}
+	};
+	return self;
+});
+var Obstacle = Container.expand(function () {
+	var self = Container.call(this);
+	var obstacleGraphics = self.attachAsset('debris', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.update = function () {
+		self.y += roadSpeed;
+		// Remove if off screen
+		if (self.y > 2732 + 50) {
+			self.destroy();
+			for (var i = obstacles.length - 1; i >= 0; i--) {
+				if (obstacles[i] === self) {
+					obstacles.splice(i, 1);
+					break;
+				}
+			}
+		}
+		// Check collision with car
+		if (self.intersects(car)) {
+			car.takeDamage(15);
+			self.destroy();
+			for (var i = obstacles.length - 1; i >= 0; i--) {
+				if (obstacles[i] === self) {
+					obstacles.splice(i, 1);
+					break;
+				}
+			}
+		}
+	};
+	return self;
+});
+var Pickup = Container.expand(function (type) {
+	var self = Container.call(this);
+	self.pickupType = type || 'scrap';
+	var assetName = 'scrapMetal';
+	if (self.pickupType === 'armor') {
+		assetName = 'armorPlate';
+	} else if (self.pickupType === 'weapon') {
+		assetName = 'weaponPart';
+	}
+	var pickupGraphics = self.attachAsset(assetName, {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.update = function () {
+		self.y += roadSpeed;
+		// Remove if off screen
+		if (self.y > 2732 + 50) {
+			self.destroy();
+			for (var i = pickups.length - 1; i >= 0; i--) {
+				if (pickups[i] === self) {
+					pickups.splice(i, 1);
+					break;
+				}
+			}
+		}
+		// Check collision with car
+		if (self.intersects(car)) {
+			self.collect();
+		}
+	};
+	self.collect = function () {
+		LK.getSound('collect').play();
+		if (self.pickupType === 'scrap') {
+			scrapCount++;
+			car.speed += 0.1;
+		} else if (self.pickupType === 'armor') {
+			armorCount++;
+			car.armor += 2;
+		} else if (self.pickupType === 'weapon') {
+			weaponCount++;
+			car.damage += 3;
+			car.fireRate = Math.max(10, car.fireRate - 1);
+		}
+		updateUpgradeDisplay();
+		self.destroy();
+		for (var i = pickups.length - 1; i >= 0; i--) {
+			if (pickups[i] === self) {
+				pickups.splice(i, 1);
+				break;
+			}
+		}
+	};
+	return self;
+});
+var Zombie = Container.expand(function (type) {
+	var self = Container.call(this);
+	self.zombieType = type || 'normal';
+	var assetName = 'zombie';
+	if (self.zombieType === 'fast') {
+		assetName = 'fastZombie';
+		self.speed = 6;
+		self.health = 15;
+		self.damage = 15;
+	} else if (self.zombieType === 'tank') {
+		assetName = 'tankZombie';
+		self.speed = 3;
+		self.health = 50;
+		self.damage = 30;
+	} else {
+		self.speed = 4;
+		self.health = 20;
+		self.damage = 20;
+	}
+	var zombieGraphics = self.attachAsset(assetName, {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.maxHealth = self.health;
+	self.update = function () {
+		// Move towards car
+		var dx = car.x - self.x;
+		var dy = car.y - self.y;
+		var distance = Math.sqrt(dx * dx + dy * dy);
+		if (distance > 0) {
+			self.x += dx / distance * self.speed;
+			self.y += dy / distance * self.speed;
+		}
+		// Check collision with car
+		if (self.intersects(car)) {
+			car.takeDamage(self.damage);
+			self.destroy();
+			for (var i = zombies.length - 1; i >= 0; i--) {
+				if (zombies[i] === self) {
+					zombies.splice(i, 1);
+					break;
+				}
+			}
+		}
+	};
+	self.takeDamage = function (damage) {
+		self.health -= damage;
+		LK.effects.flashObject(self, 0xff0000, 200);
+		if (self.health <= 0) {
+			LK.setScore(LK.getScore() + 10);
+			self.destroy();
+			for (var i = zombies.length - 1; i >= 0; i--) {
+				if (zombies[i] === self) {
+					zombies.splice(i, 1);
+					break;
+				}
+			}
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x1a5a1a
+});
+
+/**** 
+* Game Code
+****/ 
+// Game variables
+var car;
+var zombies = [];
+var bullets = [];
+var pickups = [];
+var obstacles = [];
+var roadSegments = [];
+var roadLines = [];
+var roadSpeed = 8;
+var spawnTimer = 0;
+var pickupTimer = 0;
+var obstacleTimer = 0;
+var difficultyTimer = 0;
+var scrapCount = 0;
+var armorCount = 0;
+var weaponCount = 0;
+var dragActive = false;
+// Create road background
+for (var i = 0; i < 10; i++) {
+	var roadSegment = LK.getAsset('road', {
+		anchorX: 0.5,
+		anchorY: 0
+	});
+	roadSegment.x = 1024;
+	roadSegment.y = i * 400 - 400;
+	roadSegments.push(roadSegment);
+	game.addChild(roadSegment);
+}
+// Create road lines
+for (var i = 0; i < 30; i++) {
+	var roadLine = LK.getAsset('roadLine', {
+		anchorX: 0.5,
+		anchorY: 0
+	});
+	roadLine.x = 1024;
+	roadLine.y = i * 150 - 300;
+	roadLines.push(roadLine);
+	game.addChild(roadLine);
+}
+// Create car
+car = game.addChild(new Car());
+car.x = 1024;
+car.y = 2200;
+// UI Elements
+var healthBar = new Text2('Health: 100', {
+	size: 60,
+	fill: 0xFF4444
+});
+healthBar.anchor.set(0, 0);
+LK.gui.topLeft.addChild(healthBar);
+healthBar.x = 120;
+healthBar.y = 20;
+var scoreText = new Text2('Score: 0', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+scoreText.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreText);
+var upgradeText = new Text2('Scrap:0 Armor:0 Weapons:0', {
+	size: 50,
+	fill: 0x00FF00
+});
+upgradeText.anchor.set(1, 0);
+LK.gui.topRight.addChild(upgradeText);
+upgradeText.x = -20;
+upgradeText.y = 20;
+function updateUpgradeDisplay() {
+	upgradeText.setText('Scrap:' + scrapCount + ' Armor:' + armorCount + ' Weapons:' + weaponCount);
+}
+function spawnZombie() {
+	var zombieType = 'normal';
+	var rand = Math.random();
+	if (LK.ticks > 1800) {
+		// After 30 seconds
+		if (rand < 0.2) zombieType = 'fast';else if (rand < 0.35) zombieType = 'tank';
+	}
+	var zombie = new Zombie(zombieType);
+	zombie.x = Math.random() * 1800 + 124;
+	zombie.y = Math.random() < 0.5 ? -50 : 2782;
+	zombies.push(zombie);
+	game.addChild(zombie);
+}
+function spawnPickup() {
+	var pickupTypes = ['scrap', 'armor', 'weapon'];
+	var pickupType = pickupTypes[Math.floor(Math.random() * pickupTypes.length)];
+	var pickup = new Pickup(pickupType);
+	pickup.x = Math.random() * 1800 + 124;
+	pickup.y = -50;
+	pickups.push(pickup);
+	game.addChild(pickup);
+}
+function spawnObstacle() {
+	var obstacle = new Obstacle();
+	obstacle.x = Math.random() * 1800 + 124;
+	obstacle.y = -50;
+	obstacles.push(obstacle);
+	game.addChild(obstacle);
+}
+// Touch controls
+game.down = function (x, y, obj) {
+	dragActive = true;
+};
+game.move = function (x, y, obj) {
+	if (dragActive) {
+		car.x = Math.max(124, Math.min(1924, x));
+	}
+};
+game.up = function (x, y, obj) {
+	dragActive = false;
+};
+game.update = function () {
+	// Update road movement
+	for (var i = 0; i < roadSegments.length; i++) {
+		roadSegments[i].y += roadSpeed;
+		if (roadSegments[i].y > 2732) {
+			roadSegments[i].y -= 4000;
+		}
+	}
+	for (var i = 0; i < roadLines.length; i++) {
+		roadLines[i].y += roadSpeed;
+		if (roadLines[i].y > 2732) {
+			roadLines[i].y -= 4500;
+		}
+	}
+	// Spawn zombies
+	spawnTimer++;
+	var spawnRate = Math.max(30, 120 - Math.floor(LK.ticks / 600) * 10);
+	if (spawnTimer >= spawnRate) {
+		spawnZombie();
+		spawnTimer = 0;
+	}
+	// Spawn pickups
+	pickupTimer++;
+	if (pickupTimer >= 180) {
+		spawnPickup();
+		pickupTimer = 0;
+	}
+	// Spawn obstacles
+	obstacleTimer++;
+	if (obstacleTimer >= 240) {
+		spawnObstacle();
+		obstacleTimer = 0;
+	}
+	// Increase difficulty over time
+	difficultyTimer++;
+	if (difficultyTimer >= 600) {
+		// Every 10 seconds
+		roadSpeed += 0.2;
+		difficultyTimer = 0;
+	}
+	// Update score based on survival time
+	if (LK.ticks % 60 === 0) {
+		LK.setScore(LK.getScore() + 1);
+	}
+	// Update UI
+	healthBar.setText('Health: ' + Math.max(0, car.health));
+	scoreText.setText('Score: ' + LK.getScore());
+};
+// Start background music
+LK.playMusic('bgmusic');
\ No newline at end of file