In this tutorial http://unity3d.com/earn/tutorials/projects/space-shooter/moving-the-player In most traditional shmups, the player's ship will stop immediately after the player released the d-pad. But in this tutorial, the ship will need some time to decelerate before stop completely. Also, if the player pushes the ship to the boundary, the ship will bounce off a bit after released the d-pad. Is it possible to disable these behaviors? I tried to fiddle with parameters like drag/mass and even tried to use transform.Translate to move an object but still unsuccessful. Please help, thanks!