Didn't keep exact count but somewhere around 20 hours, was satisfied with how it turned out so submitted it earlier than expected. My sleep schedule has been utterly cursed since.
I spent 6 hours working on my game. Only for Unity to crash and I had to start over. So, I went to sleep for about 5 hours. Then worked on the game for about 20 hours after that. I like where it’s at now but working on an update for after the jam :)