For a little while now I have been thinking about good addictive games that everyone would like to play on the arduboy so here is the list:
COOKIE CLICKER a game where you click a cookie and you buy upgrades with the cookies
PAC MAN a game where you run around eating dots and ghosts are chasing you
JOKE MAKER a game when the arduboy randomly makes jokes each time you switch it on
PIXEL MINER a game where a miner mines pixels and you can get better machines to earn more pixels
JUMP a game where a platform moves and there is a ball which stays still and you have to jump onto the next platform
If you want you can create some of these games and put them up so they will be available to the public.