plane control

Hello, I am working on a game like Missiles or Go Plane (Voodoo game) its simply you're trying to avoid missiles. But I have a problem in coding. I cant control smooth on android device.

Is there any tips for that kind of controller? [Go Plane Gameplay][1] [1]: https://www.youtube.com/watch?v=tpgDlVkzmwU

And this is my code. I am simply trying to make a controller like that. Any help would be appreciated. What should I do or is there any guide for that?

 if (Input.touchCount >0)
         {
             Touch touch = Input.GetTouch(0);
             Vector2 touchPos = Camera.main.ScreenToWorldPoint(touch.position);
 
             switch(touch.phase)
             {
                 case TouchPhase.Began:
                     deltaX = touchPos.x - transform.position.x;
                     deltaY = touchPos.y - transform.position.y;
                     break;
 
                 case TouchPhase.Moved:
                     
                     rb.MovePosition(new Vector2(touchPos.x - deltaX, touchPos.y - deltaY));
                     break;
 
                 case TouchPhase.Ended:
                     rb.velocity = Vector2.zero;
                     break;
             }
         }