I have some friends who have never made a game, and who lately are excited to participate in some way. I invited them to participate with me, however they have no availability to commit to 48hrs.

According to the COMPO rules, I must do the project myself.

My question is: It's okay if they contributed some detail to the game. (like drawing a bush, bird, etc. (or an Easter egg))? Or would that be against the rules? The programming, art, sound etc would be mainly done by me, but they would contribute with some detail.

Anyway, I think it would be a good start, to be able to convince them to actually participate in the next one.

Has anyone done something like that? Is everything okay according to the rules?