===================================================================
--- original.js
+++ change.js
@@ -29,8 +29,34 @@
 	self.up = function (x, y, obj) {
 		// Handle touch up event
 	};
 });
+// Define the AI for the Seaman class
+var SeamanAI = Container.expand(function () {
+	var self = Container.call(this);
+	var seamanGraphics = self.attachAsset('seaman', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Set initial direction and speed
+	self.direction = Math.random() * Math.PI * 2;
+	self.speed = 2;
+	// Update function for the AI movement
+	self.update = function () {
+		// Calculate the new position
+		var newX = self.x + Math.cos(self.direction) * self.speed;
+		var newY = self.y + Math.sin(self.direction) * self.speed;
+		// Check if the new position is inside the screen bounds
+		if (newX < 0 || newX > 2048 || newY < 0 || newY > 2732) {
+			// If not, change the direction
+			self.direction += Math.PI;
+		} else {
+			// If yes, update the position
+			self.x = newX;
+			self.y = newY;
+		}
+	};
+});
 
 /**** 
 * Initialize Game
 ****/ 
@@ -47,10 +73,10 @@
 var score = 0;
 var scoreTxt;
 // Initialize game elements
 function initGame() {
-	// Create and position the Seaman
-	seaman = game.addChild(new Seaman());
+	// Create and position the Seaman with AI
+	seaman = game.addChild(new SeamanAI());
 	seaman.x = 2048 / 2;
 	seaman.y = 2732 / 2;
 	// Move the seaman sprite to the front
 	seaman.zIndex = 1;
@@ -101,13 +127,10 @@
 			createFood();
 		}
 	}
 };
-// Handle touch down event
-game.down = function (x, y, obj) {
-	seaman.x = x;
-	seaman.y = y;
-};
+// Remove touch down event handler
+game.down = function (x, y, obj) {};
 // Handle touch up event
 game.up = function (x, y, obj) {
 	// No action needed on touch up
 };