===================================================================
--- original.js
+++ change.js
@@ -590,137 +590,8 @@
 	globalHealthBar.y = 2560; // Position at the top center
 	uiLayer.addChild(globalHealthBar); // Add to the UI layer to ensure visibility
 	return self;
 });
-var UpgradedZombie = Container.expand(function () {
-	var self = Container.call(this);
-	// Add the upgraded zombie graphics
-	self.zombieGraphics = self.attachAsset('Zombie', {
-		anchorX: 0.5,
-		anchorY: 0.5
-	});
-	self.zombieGraphics.tint = 0xff0000; // Red tint for upgraded zombies
-	// Attributes
-	self.speed = 3; // Faster speed for upgraded zombies
-	self.harvestTime = 3000; // Faster harvest time
-	self.attackCooldown = 2000; // Faster attack cooldown
-	self.lastAttackTime = 0;
-	self.state = 'roaming';
-	self.targetX = Math.random() * 2048;
-	self.targetY = Math.random() * 2432;
-	self.inRadiusStartTime = null;
-	var agonySound = null;
-	var harvestSoundPlayed = false;
-	// Helper function: Generate a random roaming target
-	function setRandomTarget() {
-		self.targetX = Math.random() * 2048;
-		self.targetY = Math.random() * 2432;
-	}
-	// Helper function: Move to a target
-	function moveToTarget(targetX, targetY) {
-		var speedMultiplier = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 1;
-		var dx = targetX - self.x;
-		var dy = targetY - self.y;
-		var distance = Math.sqrt(dx * dx + dy * dy);
-		if (distance > 1) {
-			self.x += dx / distance * self.speed * speedMultiplier;
-			self.y += dy / distance * self.speed * speedMultiplier;
-		} else {
-			setRandomTarget();
-		}
-	}
-	// Update behavior
-	self.update = function () {
-		var dx = mishnu.x - self.x;
-		var dy = mishnu.y - self.y;
-		var distanceToMishnu = Math.sqrt(dx * dx + dy * dy);
-		switch (self.state) {
-			case 'roaming':
-				moveToTarget(self.targetX, self.targetY);
-				if (distanceToMishnu < radius.radiusSize) {
-					self.state = 'attacking';
-					self.inRadiusStartTime = Date.now();
-					if (Math.random() < 1 / 2) {
-						agonySound = getRandomSound(['GiggleMan_1', 'GiggleMan_2', 'GiggleMan_3', 'GiggleMan_4']);
-						agonySound.volume = 0.3;
-						agonySound.play();
-					}
-				}
-				break;
-			case 'attacking':
-				moveToTarget(mishnu.x, mishnu.y, 1.5);
-				if (distanceToMishnu < radius.radiusSize) {
-					var elapsedTime = Date.now() - self.inRadiusStartTime;
-					if (elapsedTime >= self.harvestTime / mishnu.harvestSpeed) {
-						self.state = 'harvested';
-						game.removeChild(self);
-						zombies.splice(zombies.indexOf(self), 1);
-						mishnu.humansHarvested += 2;
-						if (!harvestSoundPlayed) {
-							LK.getSound('Ding_1').play();
-							getRandomSound(['Squish_1', 'Squish_2', 'Squish_3', 'Squish_4']).play();
-							harvestSoundPlayed = true;
-						}
-						addBloodSplashes(true);
-						return;
-					}
-					if (distanceToMishnu < 50 && Date.now() - self.lastAttackTime > self.attackCooldown) {
-						globalHealthBar.setHealth(globalHealthBar.currentHealth - 1);
-						self.lastAttackTime = Date.now();
-						self.state = 'fleeing';
-						var fleeAngle = Math.random() * Math.PI * 2;
-						self.targetX = mishnu.x + Math.cos(fleeAngle) * (radius.radiusSize + 50);
-						self.targetY = mishnu.y + Math.sin(fleeAngle) * (radius.radiusSize + 50);
-						addBloodSplashes();
-						flashGreyMask([mishnu, radius, globalHealthBar], 400, 3);
-						LK.getSound('Hit').play();
-						LK.setTimeout(function () {
-							LK.getSound('Bark').play();
-						}, 200);
-					}
-				} else {
-					self.state = 'roaming';
-					setRandomTarget();
-				}
-				break;
-			case 'fleeing':
-				moveToTarget(self.targetX, self.targetY, 2);
-				if (distanceToMishnu > radius.radiusSize + 50) {
-					self.state = 'roaming';
-					setRandomTarget();
-				} else if (distanceToMishnu < radius.radiusSize) {
-					if (!self.inRadiusStartTime) {
-						self.inRadiusStartTime = Date.now();
-					}
-					var elapsedTime = Date.now() - self.inRadiusStartTime;
-					if (elapsedTime >= self.harvestTime) {
-						self.state = 'harvested';
-						game.removeChild(self);
-						zombies.splice(zombies.indexOf(self), 1);
-						mishnu.humansHarvested += 2;
-						if (!harvestSoundPlayed) {
-							LK.getSound('Ding_1').play();
-							getRandomSound(['Squish_1', 'Squish_2', 'Squish_3', 'Squish_4']).play();
-							harvestSoundPlayed = true;
-						}
-						addBloodSplashes(true);
-						return;
-					}
-				}
-				break;
-			case 'harvested':
-				break;
-			default:
-				console.error("Zombie in unknown state: ".concat(self.state));
-				self.state = 'roaming';
-				setRandomTarget();
-				break;
-		}
-	};
-	// Set initial target
-	setRandomTarget();
-	return self;
-});
 var Zombie = Container.expand(function () {
 	var self = Container.call(this);
 	// Add the zombie graphics
 	self.zombieGraphics = self.attachAsset('Zombie', {
@@ -1024,12 +895,14 @@
 				spawnY = Math.random() * (2432 - 300);
 				break;
 		}
 		var newZombie;
-		if (currentLevelGroup === 0) {
-			newZombie = new Zombie(); // Base zombie
-		} else {
-			newZombie = new UpgradedZombie(); // Upgraded zombie for higher levels
+		newZombie = new Zombie(); // Use base zombie class
+		if (currentLevelGroup > 0) {
+			// Upgrade stats for higher levels
+			newZombie.speed *= 1.1 * currentLevelGroup; // Increase speed by 10% per level group
+			newZombie.harvestTime = (newZombie.harvestTime || 4000) * Math.pow(2, currentLevelGroup); // Increase harvest time exponentially
+			newZombie.zombieGraphics.tint = 0xff0000; // Red tint for upgraded zombies
 		}
 		newZombie.x = spawnX;
 		newZombie.y = spawnY;
 		zombies.push(newZombie);