Good to know! Maybe it's good to put these criteria in the rules/FAQ too.
By the way, since I'm posting in this thread anyway: I wouldn't call using Kenney assets "the real challenge"! It's actually a service, to level the playing field for all game designers / developers without artist skills (like me). Creating a game with only Kenney assets is easy - I just submitted one to a game jam last week (and it isn't the first time). I'm not sure whether I'll have time to join in august though... :-/