My brother will be happy to hear you liked the art! And I'm glad you noticed the changing outfits, those were a bit of a pain to implement.
Selective hurtboxes sounds like a good idea, I definitely made a mistake to not change a few settings in that area. The biggest mistake was definitely that there were no invincibility frames. My bad.
In any case, thanks for playing and leaving feedback, it really helps me learn how to do better.