Me too. Since I couldn't save a lot of time for play-testing before the deadline, I have found minor bugs and things to improve in the game after the submission.
There was one major error which I fixed and re-uploaded, thankfully, before the deadline but there are still more things to change.
The hosts have responded to similar questions by saying that you can upload another file of your choice if you want to do so, but while keeping this previous file as it is on the website and labelling it as the one made for the game-jam specifically.