Good job coming up with a cool, innovative idea. I felt like a shotputter throwing the sun around, which was a super cool feeling I never thought I'd experience :)
The physics work well for the most part, but I had some difficulty with the fireball maybe sticking to the walls or protruding through them? Not sure, as I was swingin that thing round real fast at the time.
Some polish on the assets would have helped, but I understand the constraints of a game jam doesn't always allow for that sort of thing.