I was watching Adult Swim last night, and they had this new cartoon about some heavy metal band.
It was probably meant as some sort of joke, but they had this guy playing a stand up arcade machine with wheelchair controls playing a handicapped player in the game.
There was two wheels, only the top half sticking out of the control panel. About the size of regular steering wheel controls, but turned up and down. You spun them similar as you would spin wheelchair wheels.
I could probably draw a picture of it, if what I am saying does not make sense.
But anyways, its probably not politically correct for a game, but I thought it would make an interesting project for someone.