I made this wii game purely for my own benefit...(ie practice and to get familiar with c again), but I'll share it with you guys. It uses the gamecube d-pad.
push the button when it says SHOOT! Up is rock, left is paper, and down is scissors. Press start to exit. Oh yeah, and put it in the apps folder.
And I guess use at your own risk...I've tested it a lot.
I guess I need to say this, too... I used GRRlib and libogc