jim and me were playing this little game we made up where you say a move and the other person has to hit that move within three tries... you do this until someone hits it, then the other person gets a chance to tie it, if you dont manage to tie it your have to eat something disgusting.
But considering that the moves you pick would probably be somewhat hard and you would have to spend a lot of time eating the stuff and waiting around for someone else to hit the trick it sounds like the game would be pretty detrimental to progression.