Very nice! Loved the artworks for the character, the pixel art, the enemies design and animations, the theme and the setting. Music is very atmospheric and very cool. Dialogues were fun too!
At some point though, I got stuck at the bottom of a cave and couldn't progress, I don't know if that is supposed to happen (maybe I am missing some powerup to jump higher or something similar) or if it is a bug I encountered.
Also, I noticed some tileset errors where tiles were not properly aligned, but just minor stuff.
Overall the game looks very nice, keep up the good work, and try to expand on it, maybe by polishing the main character movement and adding some more animations to it, adding particles, ect... The game has some potential to be a full game!