Hello,
Me and my two friends want to work together on a game. Is that okay? We don't mind if we can't "win", we just want to participate to get an excuse to learn more lisp! :D
/Jona
It probably makes sense to register individually and submit them under each account, just to get a sense of who did what and how many people are actually participating, but there is no rule for this so do what you want :)
If you have any other questions, feel free to drop by #lispgames on Freenode IRC, where there are many people there to help.