Hmm. Yeah, okay. Do you (or anyone else) have any other stipulations for how the games would have to be?
Do you mean genre of the base game - or the supplemental submissions?
Not neccessarily either
No, I think you have a more than good enough handle on design - taking those base rules and applying your flourish would be awesome!
Hmm. Not sure. You could maybe stipulate that the games can't use some common mechanic -- hit points, for example -- or that it has to use some uncommon mechanic, like playing cards.