I'm with you on the last day being stressful! But that's usually how jams go. For me, I struggled to get the builds to work before submission, my UI (which is pretty much my whole game) got moved all around and the aspect ratio was never right, but eventually I got it! I'm just glad I was able to have a playable game in time.
https://itch.io/jam/brackeys-14/rate/3850511