Skyfall is a 3D sky diving game for the Microsoft Kinect. Players control the avatar by leaning left and right thus moving the character around the circumference of a circle.
Convincing and natural 3D movement control is hard to get right with the Kinect, my solution is really 2D movement in disguise. This still gives the player a sense of the world in 3D while using simple 2D controls.
Built in two weeks by myself using C#/XNA