This is PoC I wrote not long time ago. The main idea is that player controls Sonic while other controls camera. Otherwise the game is the same. You move the camera with D-Pad and stop it by pressing C. If player 2's selection is NONE, will player 1 control both Sonic AND the Camera, adding some extra challenge. If however both choose NONE, nobody will be able to control anything. Aside from that there is nothing to say I guess, happy game overs I guess.
Screenshots & Videos
Dying is easy
http://shc.sonicresearch.org/Image/e24i4_2013|640|446|672|Dying is easy
Sonic is too fast
http://shc.sonicresearch.org/Image/e24i5_2013|640|448|672|Sonic is too fast