A few questions:
1) Do the entries have to work together/fit together? If so, would they have to work with the winner of the last contest? If not, is it okay if someone's set of characters does?
2) If someone signs up for one contest, do they have to do so for the others? If someone misses one, are they allowed to sign up for future ones?
I also feel as though you're referencing something with this 'chops' thing and the basket ingredients (the terms/words used are oddly specific), but I'm not sure what.