You have to love this game, and if you haven't played it by now you fail at life!
http://www.addictinggames.com/kittencannon.html
just imagine it on the Zune!
controls would be pretty simple
press up - move cannon up
press down - move cannon down
press center - FIRE!
play/pause - menu with music/restart game/anything else
back button - quit game
id try to do this is i had any C# skills but dont. Anyone want to take a shot at it?