The pixel art is really unbelievable! Fighting feels great and getting hit was never unfair. This is 100% how NES games would feel if there were fewer hardware limitations, it is very impressive how you captured the vibe. Congratulations :)
Some nitpicks: in the cutscene, the text is centered and that makes it hard to read while words are moving. I would also have liked shorter levels because it is a game jam entry and I want to see everything + have time to check other entries (just my taste)!
Looking forward to seeing what you will do next :)