Hey, I had a great time playing this game. At one point, I think I forgot I was playing a game jam :D
The weapon wheel mechanic works perfectly. And the bosses are difficult, though not unplayable. Each one took me about 5 or 6 attempts. I really enjoyed learning the patterns and finding a strategy in my choice of weapon to defeat them.
I think my ultimate build was: 3 multi-bullet cannon, 1 5HP heal, and again 3 multi-bullet cannon, 1 5HP heal.
So well done to the whole team for a great game :D