This does exist already. Not that many games are supported though. Seemed to work pretty well but I only had like one game that was compatible (super crate boy I believe) and I tried a demo of some other game that seemed ok. edit: it doesn't have the motion controls however, it's just a d-pad and two buttons. 2nd edit: Wow, 50 posts in 5 1/2 years! Such an honor to make it this far.
6/9/14 at 7:22pm