===================================================================
--- original.js
+++ change.js
@@ -41,17 +41,14 @@
 	var self = Container.call(this);
 	var enemyGraphics = self.createAsset('enemy', 'Enemy character', 0.5, 0.5);
 	self.speed = 2;
 	self.move = function () {
-		// Inverse movement to simulate map scrolling
-		self.move = function (touchPosition) {
-			if (touchPosition) {
-				var dx = (2048 / 2 - touchPosition.x) * 0.1;
-				var dy = (2732 / 2 - touchPosition.y) * 0.1;
-				self.x += dx;
-				self.y += dy;
-			}
-		};
+		// Movement towards the hero's position
+		var dx = hero.x - self.x;
+		var dy = hero.y - self.y;
+		var angle = Math.atan2(dy, dx);
+		self.x += Math.cos(angle) * self.speed;
+		self.y += Math.sin(angle) * self.speed;
 	};
 });
 // Bullet class
 var Bullet = Container.expand(function () {
@@ -66,8 +63,10 @@
 /**** 
 * Initialize Game
 ****/
 var game = new LK.Game({
+	backgroundAsset: 'swamp',
+	// Add swamp background asset
 	backgroundColor: 0x000000 // Init game with black background
 });
 
 /**** 
@@ -134,8 +133,13 @@
 
 // Game tick event
 LK.on('tick', function () {
 	// Move the hero towards the touch position
+	if (game.touchPosition) {
+		hero.x += (game.touchPosition.x - hero.x) * 0.1;
+		hero.y += (game.touchPosition.y - hero.y) * 0.1;
+	}
+
 	// Move bullets and check for collisions with enemies
 	for (var i = bullets.length - 1; i >= 0; i--) {
 		bullets[i].move();
 		// Check for bullet-enemy collisions
@@ -161,9 +165,9 @@
 	}
 
 	// Move enemies
 	for (var j = enemies.length - 1; j >= 0; j--) {
-		enemies[j].move(game.touchPosition);
+		enemies[j].move();
 		if (enemies[j].intersects(hero)) {
 			hero.lives -= 1; // Decrease hero's lives by one
 			hero.updateLives(); // Update the lives display
 			LK.effects.flashScreen(0xff0000, 500); // Flash screen red for half a second