This is a super polished game!
I definitely get the retro vibes on this one, for sure!
I recommend choosing a different color for the main character as the purple is a bit hard to see on the dark background. That being said, I do like the overall color palette!
One thing that would be nice to see would be the enemy's health bar during battles. (I don't know if that's historically accurate for the genre though?)
Regardless, this is a really well-put-together game. Great job!