Sorry for the confusion, I hope that you will take the challenge and make something anyway! This jam is supposed to be laid back and for you, that is why we don't have too many rules and restrictions. You're also free to go over the 3 hours if it's necessary (but then you don't compete for winning). You can submit a 3 hour version and keep working on the game and submit an improved version. You can make several projects. It's all about you having fun, improving and experimenting. :)