Wii Balance Board + Audiosurf + Motion Controls = Awesome
BodySurf is a script for GlovePIE that rigs up the Wii Balance Board to play Audiosurf. It is full-featured, with a strong focus on player immersion and ease of user interface. The controls are simple and intuitive: the player moves by leaning from side to side on the balance board, and most character abilities are activated by motion controls.
Mono Pro: Hold A+B on the Wiimote to scoop all three lanes. To jump, simply jump up off the balance board. (See warnings.)
Pointman: Hold A+B to pick up a block or powerup, release to let go of it. To get the hint arrows, point the Wiimote vertically - after all, you need to raise your hand when you want help ;)
Vegas: Shake the Wiimote (like you're getting ready to roll dice) to deploy your powerup.
Eraser: Hold A+B on the Wiimote to erase.
Pusher: Point the Wiimote to the left or right to indicate which direction to push.
Ninja Mono: Hold A+B on the Wiimote to scoop all three lanes, and thrust the Wiimote forward to throw a shuriken.
The system requirements are fairly simple: you need only a Wii Balance Board, a computer with Bluetooth, and a Wii Remote (which you probably have if you have a Balance Board anyway.) You also (obviously) need a copy of Audiosurf, which you should get anyway since it's only $10 on Steam.