===================================================================
--- original.js
+++ change.js
@@ -121,37 +121,18 @@
 // Update game logic
 game.update = function () {
 	// Update hero
 	hero.update();
-	// Add keyboard event listeners for hero movement
-	LK.on('keydown', function (event) {
-		switch (event.key) {
-			case 'w':
-				// Move hero forward
-				if (hero.y > 0) {
-					hero.y -= hero.speed;
-				}
-				break;
-			case 'a':
-				// Move hero left
-				if (hero.x > 0) {
-					hero.x -= hero.speed;
-				}
-				break;
-			case 's':
-				// Move hero back
-				if (hero.y < 2732) {
-					hero.y += hero.speed;
-				}
-				break;
-			case 'd':
-				// Move hero right
-				if (hero.x < 2048) {
-					hero.x += hero.speed;
-				}
-				break;
-		}
-	});
+	// Handle touch events for hero movement
+	game.down = function (x, y, obj) {
+		// Calculate direction based on touch position
+		var dx = x - hero.x;
+		var dy = y - hero.y;
+		var angle = Math.atan2(dy, dx);
+		// Move hero
+		hero.x += Math.cos(angle) * hero.speed;
+		hero.y += Math.sin(angle) * hero.speed;
+	};
 	// Update enemies
 	for (var i = enemies.length - 1; i >= 0; i--) {
 		enemies[i].update();
 		if (enemies[i].intersects(hero)) {