I love, love, love the simplicity that the game has. However, I think a healthbar or some other kind of hit marker for the characters would make it a lot more enjoyable/ intuitive. Definitely partially user error, but until I played the 4th character with the laser I did not even realize I was damaging the boss. I do love the mechanics and design though! (I would probably tweak the laser character because you can kind of just spam the laser and all the bosses die).
