I'm looking to create a game with the Unity 3D game engine. The game concept is relatively simple. The player controls a ball traveling at a constant rate on a rail. The player only has control over the ball's orientation on the rail as the rail is a fixed track. The player moves right or left to control the ball's orientation to avoid stationary objects blocking certain points on the rail. I'm looking for only the basic engine setup. A small circular course with possibly one obstacle would be excellent. I've attached a picture to further explain the game's control scheme.