Android Lag ( Movement via GUI Buttons )

Hi, my name is Ivan.

I am creating a infinite runner game and you move left and right in the game by tapping the GUI Buttons. My problem is when you are moving it lags so much that you can't even play the game. Here is the code:

 #pragma strict
 var ballSpeed = 0.001;
 var ballLeftLimit : float;
 var ballRightLimit : float;
 
 function OnGUI() 
 {
     if(GUI.RepeatButton(Rect(0, Screen.height - 100, 100, 100), "<"))
     {
         if(transform.position.x > ballLeftLimit)
             transform.position.x -= ballSpeed;
     }
     
     if(GUI.RepeatButton(Rect(Screen.width - 100, Screen.height - 100, 100, 100), ">"))
     {
         if(transform.position.x < ballRightLimit)
             transform.position.x += ballSpeed;
     }
 }

And here is the picture of a profiler:

Is there any solution for this problem, if so please help me out :)

Best regards, Ivan!