Not too shabby of a boss rush! All of the bosses felt pretty good to fight as they had a good assortment of patterns and also had a nice evolution in intensity when low on health. Graphics were cute and there were some nice funny touches like the freeze-frame followed by explosion upon death. Just a nice short and sweet adventure that I wish had even more to it, but for a game jam, it's understandable and even impressive.
I didn't get to experience it in its ideal coop form, but the game was still playable and fun in the solo mode, so thank you for including that option. I'm actually not sure if I'd like the coop mode anyway: I tried to play coop mode by myself and I saw that if just one player dies its an immediate game over, while feels unnecessarily harsh and could lead to toxicity.