Kinda the same here. I just submitted mine. There is still one big thing I would like to add involving a custom lighting shader in Unity which I can't find any documentation on... Besides that it went relatively smoothly but I feel rather burned out. I did another game jam shortly before and that all besides my normal job...
I could add more stuff to my game and make it longer but that just seems tedious both for me and the player that probably already played similar games plenty of times. My custom lighting idea would have allowed interesting game mechanics though but there comes the lack of Unity documentation...