This was a lot of fun. I love the 8-bit aesthetic. I do think that making the enemies take less hits would have added to it.
I also think that the distance you go when hit should be tweaked. It made the boss fight much more annoying to feel like I'd lost progress every time I wasn't able to dodge (which happened a lot, I died around 7 times on him).
I hope you keep working on it. It has potential!