oh man, in one day, you're settling a world record!! 😅
I find that if you don't have enough time you can only create things you already know how to do. But it's tough creating something truly new and original.
you can continue updating/polishing the game after you've submitted, just leave an original jam version to be downloaded. I didn't participate in this jam, but that's what i did for my game for the previous mini-jam