===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,490 @@
-/****
+/**** 
+* 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 = 8;
+	self.damage = player ? player.damage : 20;
+	self.direction = {
+		x: 0,
+		y: 0
+	};
+	self.update = function () {
+		self.x += self.direction.x * self.speed;
+		self.y += self.direction.y * self.speed;
+		if (self.x < -50 || self.x > 2098 || self.y < -50 || self.y > 2782) {
+			self.shouldRemove = true;
+		}
+	};
+	return self;
+});
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.health = 100;
+	self.maxHealth = 100;
+	self.damage = 20;
+	self.fireRate = 30; // Lower = faster
+	self.speed = 4;
+	self.lastShot = 0;
+	self.takeDamage = function (amount) {
+		self.health -= amount;
+		if (self.health <= 0) {
+			self.health = 0;
+			LK.showGameOver();
+		} else {
+			LK.effects.flashObject(self, 0xff0000, 300);
+			LK.getSound('playerHit').play();
+		}
+	};
+	self.heal = function (amount) {
+		self.health = Math.min(self.maxHealth, self.health + amount);
+	};
+	return self;
+});
+var XPOrb = Container.expand(function () {
+	var self = Container.call(this);
+	var orbGraphics = self.attachAsset('xpOrb', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.value = 10;
+	self.collectDistance = 30;
+	self.update = function () {
+		var dx = player.x - self.x;
+		var dy = player.y - self.y;
+		var distance = Math.sqrt(dx * dx + dy * dy);
+		if (distance < self.collectDistance) {
+			self.x += dx / distance * 6;
+			self.y += dy / distance * 6;
+			if (distance < 20) {
+				currentXP += self.value;
+				checkLevelUp();
+				self.shouldRemove = true;
+			}
+		}
+	};
+	return self;
+});
+var Zombie = Container.expand(function (type) {
+	var self = Container.call(this);
+	self.type = type || 'normal';
+	self.speed = 1;
+	self.health = 40;
+	self.damage = 25;
+	self.xpValue = 10;
+	var assetId = 'zombie';
+	if (self.type === 'fast') {
+		assetId = 'fastZombie';
+		self.speed = 2.5;
+		self.health = 25;
+		self.damage = 20;
+		self.xpValue = 15;
+	} else if (self.type === 'strong') {
+		assetId = 'strongZombie';
+		self.speed = 0.8;
+		self.health = 80;
+		self.damage = 40;
+		self.xpValue = 25;
+	}
+	var zombieGraphics = self.attachAsset(assetId, {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.takeDamage = function (amount) {
+		self.health -= amount;
+		LK.effects.flashObject(self, 0xffffff, 200);
+		if (self.health <= 0) {
+			self.isDead = true;
+			LK.getSound('zombieHit').play();
+		}
+	};
+	self.update = function () {
+		if (self.isDead) return;
+		var dx = player.x - self.x;
+		var dy = player.y - 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;
+		} else {
+			// Attack player
+			if (!self.lastAttack || LK.ticks - self.lastAttack > 60) {
+				player.takeDamage(self.damage);
+				self.lastAttack = LK.ticks;
+			}
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x2C3E50
+});
+
+/**** 
+* Game Code
+****/ 
+var player;
+var zombies = [];
+var bullets = [];
+var xpOrbs = [];
+var currentXP = 0;
+var currentLevel = 1;
+var xpToNextLevel = 100;
+var waveNumber = 1;
+var zombiesSpawned = 0;
+var zombiesInWave = 10;
+var spawnTimer = 0;
+var spawnRate = 120; // frames between spawns
+var isShowingUpgrade = false;
+var upgrades = [];
+// UI Elements
+var healthBar, xpBar, levelText, waveText, scoreText;
+function initializeUI() {
+	// Health bar background
+	var healthBg = LK.getAsset('healthBg', {
+		width: 400,
+		height: 20,
+		color: 0x800000,
+		shape: 'box'
+	});
+	healthBg.x = 100;
+	healthBg.y = 100;
+	LK.gui.topLeft.addChild(healthBg);
+	// Health bar
+	healthBar = LK.getAsset('healthBar', {
+		width: 400,
+		height: 20,
+		color: 0x00ff00,
+		shape: 'box'
+	});
+	healthBar.x = 100;
+	healthBar.y = 100;
+	LK.gui.topLeft.addChild(healthBar);
+	// XP bar background
+	var xpBg = LK.getAsset('xpBg', {
+		width: 400,
+		height: 15,
+		color: 0x404040,
+		shape: 'box'
+	});
+	xpBg.x = 100;
+	xpBg.y = 130;
+	LK.gui.topLeft.addChild(xpBg);
+	// XP bar
+	xpBar = LK.getAsset('xpBar', {
+		width: 400,
+		height: 15,
+		color: 0x00FFFF,
+		shape: 'box'
+	});
+	xpBar.x = 100;
+	xpBar.y = 130;
+	LK.gui.topLeft.addChild(xpBar);
+	// Level text
+	levelText = new Text2('Level: 1', {
+		size: 40,
+		fill: '#ffffff'
+	});
+	levelText.anchor.set(0, 0);
+	levelText.x = 100;
+	levelText.y = 50;
+	LK.gui.topLeft.addChild(levelText);
+	// Wave text
+	waveText = new Text2('Wave: 1', {
+		size: 30,
+		fill: '#ffffff'
+	});
+	waveText.anchor.set(0.5, 0);
+	waveText.x = 1024;
+	waveText.y = 50;
+	LK.gui.top.addChild(waveText);
+	// Score text
+	scoreText = new Text2('Score: 0', {
+		size: 30,
+		fill: '#ffffff'
+	});
+	scoreText.anchor.set(1, 0);
+	scoreText.x = 1948;
+	scoreText.y = 50;
+	LK.gui.topRight.addChild(scoreText);
+}
+function updateUI() {
+	if (healthBar) {
+		var healthPercent = player.health / player.maxHealth;
+		healthBar.width = 400 * healthPercent;
+	}
+	if (xpBar) {
+		var xpPercent = currentXP / xpToNextLevel;
+		xpBar.width = 400 * Math.min(xpPercent, 1);
+	}
+	if (levelText) {
+		levelText.setText('Level: ' + currentLevel);
+	}
+	if (waveText) {
+		waveText.setText('Wave: ' + waveNumber);
+	}
+	if (scoreText) {
+		scoreText.setText('Score: ' + LK.getScore());
+	}
+}
+function checkLevelUp() {
+	if (currentXP >= xpToNextLevel) {
+		currentXP -= xpToNextLevel;
+		currentLevel++;
+		xpToNextLevel = Math.floor(xpToNextLevel * 1.5);
+		LK.getSound('levelUp').play();
+		showUpgradeScreen();
+	}
+}
+function showUpgradeScreen() {
+	isShowingUpgrade = true;
+	// Create upgrade options
+	var availableUpgrades = [{
+		name: 'Damage +20%',
+		apply: function apply() {
+			player.damage = Math.floor(player.damage * 1.2);
+		}
+	}, {
+		name: 'Fire Rate +25%',
+		apply: function apply() {
+			player.fireRate = Math.max(5, Math.floor(player.fireRate * 0.75));
+		}
+	}, {
+		name: 'Max Health +50',
+		apply: function apply() {
+			player.maxHealth += 50;
+			player.heal(50);
+		}
+	}, {
+		name: 'Speed +20%',
+		apply: function apply() {
+			player.speed = player.speed * 1.2;
+		}
+	}, {
+		name: 'Health Regen',
+		apply: function apply() {
+			player.hasRegen = true;
+		}
+	}];
+	// Create upgrade UI (simplified - just pick first 3)
+	var upgradeOptions = [];
+	for (var i = 0; i < 3 && i < availableUpgrades.length; i++) {
+		upgradeOptions.push(availableUpgrades[i]);
+	}
+	// Create upgrade buttons
+	var upgradeContainer = new Container();
+	upgradeContainer.x = 1024;
+	upgradeContainer.y = 1366;
+	var bgPanel = LK.getAsset('upgradePanel', {
+		width: 800,
+		height: 600,
+		color: 0x1a1a1a,
+		shape: 'box'
+	});
+	upgradeContainer.addChild(bgPanel);
+	var titleText = new Text2('LEVEL UP! Choose an upgrade:', {
+		size: 50,
+		fill: '#00FFFF'
+	});
+	titleText.anchor.set(0.5, 0.5);
+	titleText.y = -200;
+	upgradeContainer.addChild(titleText);
+	for (var i = 0; i < upgradeOptions.length; i++) {
+		var option = upgradeOptions[i];
+		var button = LK.getAsset('upgradeButton' + i, {
+			width: 600,
+			height: 100,
+			color: 0x0066CC,
+			shape: 'box'
+		});
+		button.y = -50 + i * 120;
+		button.upgradeIndex = i;
+		var buttonText = new Text2(option.name, {
+			size: 40,
+			fill: '#ffffff'
+		});
+		buttonText.anchor.set(0.5, 0.5);
+		button.addChild(buttonText);
+		button.down = function (x, y, obj) {
+			var index = obj.upgradeIndex;
+			upgradeOptions[index].apply();
+			game.removeChild(upgradeContainer);
+			isShowingUpgrade = false;
+		};
+		upgradeContainer.addChild(button);
+	}
+	game.addChild(upgradeContainer);
+}
+function spawnZombie() {
+	var type = 'normal';
+	var rand = Math.random();
+	if (waveNumber > 3 && rand < 0.3) type = 'fast';
+	if (waveNumber > 5 && rand < 0.2) type = 'strong';
+	var zombie = new Zombie(type);
+	// Spawn from edges
+	var edge = Math.floor(Math.random() * 4);
+	if (edge === 0) {
+		// top
+		zombie.x = Math.random() * 2048;
+		zombie.y = -50;
+	} else if (edge === 1) {
+		// right
+		zombie.x = 2098;
+		zombie.y = Math.random() * 2732;
+	} else if (edge === 2) {
+		// bottom
+		zombie.x = Math.random() * 2048;
+		zombie.y = 2782;
+	} else {
+		// left
+		zombie.x = -50;
+		zombie.y = Math.random() * 2732;
+	}
+	zombies.push(zombie);
+	game.addChild(zombie);
+	zombiesSpawned++;
+}
+function startNextWave() {
+	waveNumber++;
+	zombiesSpawned = 0;
+	zombiesInWave = Math.floor(10 + waveNumber * 2.5);
+	spawnRate = Math.max(30, 120 - waveNumber * 5);
+}
+// Initialize player
+player = new Player();
+player.x = 1024;
+player.y = 1366;
+game.addChild(player);
+initializeUI();
+var targetX = player.x;
+var targetY = player.y;
+game.move = function (x, y, obj) {
+	if (isShowingUpgrade) return;
+	targetX = x;
+	targetY = y;
+};
+game.down = function (x, y, obj) {
+	if (isShowingUpgrade) return;
+	targetX = x;
+	targetY = y;
+};
+game.update = function () {
+	if (isShowingUpgrade) return;
+	// Move player towards target
+	var dx = targetX - player.x;
+	var dy = targetY - player.y;
+	var distance = Math.sqrt(dx * dx + dy * dy);
+	if (distance > 5) {
+		player.x += dx / distance * player.speed;
+		player.y += dy / distance * player.speed;
+	}
+	// Keep player in bounds
+	player.x = Math.max(40, Math.min(2008, player.x));
+	player.y = Math.max(40, Math.min(2692, player.y));
+	// Player health regen
+	if (player.hasRegen && LK.ticks % 120 === 0) {
+		player.heal(5);
+	}
+	// Auto-shoot at nearest zombie
+	if (zombies.length > 0 && LK.ticks - player.lastShot >= player.fireRate) {
+		var nearestZombie = null;
+		var nearestDistance = Infinity;
+		for (var i = 0; i < zombies.length; i++) {
+			if (zombies[i].isDead) continue;
+			var zdx = zombies[i].x - player.x;
+			var zdy = zombies[i].y - player.y;
+			var zdist = Math.sqrt(zdx * zdx + zdy * zdy);
+			if (zdist < nearestDistance) {
+				nearestDistance = zdist;
+				nearestZombie = zombies[i];
+			}
+		}
+		if (nearestZombie && nearestDistance < 400) {
+			var bullet = new Bullet();
+			bullet.x = player.x;
+			bullet.y = player.y;
+			var bdx = nearestZombie.x - player.x;
+			var bdy = nearestZombie.y - player.y;
+			var bdist = Math.sqrt(bdx * bdx + bdy * bdy);
+			bullet.direction.x = bdx / bdist;
+			bullet.direction.y = bdy / bdist;
+			bullets.push(bullet);
+			game.addChild(bullet);
+			player.lastShot = LK.ticks;
+			LK.getSound('shoot').play();
+		}
+	}
+	// Update bullets
+	for (var i = bullets.length - 1; i >= 0; i--) {
+		var bullet = bullets[i];
+		if (bullet.shouldRemove) {
+			bullet.destroy();
+			bullets.splice(i, 1);
+			continue;
+		}
+		// Check bullet-zombie collisions
+		for (var j = zombies.length - 1; j >= 0; j--) {
+			var zombie = zombies[j];
+			if (zombie.isDead) continue;
+			if (bullet.intersects(zombie)) {
+				zombie.takeDamage(bullet.damage);
+				bullet.shouldRemove = true;
+				if (zombie.isDead) {
+					LK.setScore(LK.getScore() + zombie.xpValue);
+					// Create XP orb
+					var xpOrb = new XPOrb();
+					xpOrb.x = zombie.x;
+					xpOrb.y = zombie.y;
+					xpOrb.value = zombie.xpValue;
+					xpOrbs.push(xpOrb);
+					game.addChild(xpOrb);
+				}
+				break;
+			}
+		}
+	}
+	// Update zombies
+	for (var i = zombies.length - 1; i >= 0; i--) {
+		var zombie = zombies[i];
+		if (zombie.isDead) {
+			zombie.destroy();
+			zombies.splice(i, 1);
+		}
+	}
+	// Update XP orbs
+	for (var i = xpOrbs.length - 1; i >= 0; i--) {
+		var orb = xpOrbs[i];
+		if (orb.shouldRemove) {
+			orb.destroy();
+			xpOrbs.splice(i, 1);
+		}
+	}
+	// Spawn zombies
+	spawnTimer++;
+	if (spawnTimer >= spawnRate && zombiesSpawned < zombiesInWave) {
+		spawnZombie();
+		spawnTimer = 0;
+	}
+	// Check if wave is complete
+	if (zombiesSpawned >= zombiesInWave && zombies.length === 0) {
+		startNextWave();
+	}
+	updateUI();
+};
\ No newline at end of file