This game made me smile a lot! The aesthetic and art were funny and enjoyable. So creative!
The art and creative levels is definitely the strong suit, so I think it be good to remove anything that is tedious. In this case, what I found a bit tedious is the HP of the bosses. For example, I found having to stun the dragon boss more than 3 times was a bit much especially when the attacks didn't change. For me at least, the novelty is lost after the first playthrough, so dying and having to start all over was a sad ending for me.
Overall, I still had plenty of fun playing your game! Great work