A really solid prototype! The forest tiles and backgrounds look super lush and detailed, and the music was beautiful and soothing.
I loved the player sprite, and the animations were great, especially the hair flowing upwards while falling. I'm also a big fan of the sword attack animation, it looks really sharp, simple and snappy! Movement and combat are really nice and responsive as well.
I know it probably wasn't fully intentional, but I think the lack of story and context (with even the protagonist being faceless), coupled with the lush visuals, creates a really mysterious, almost mystical atmosphere. The way the protagonist looks and moves really helps her come across as the no-nonsense, outdoorsy type. I'd say the protagonist and the overall vibe remind me a lot of the old Zelda games!
Anyway, I beat up the giant fog and had fun jumping around and finding all the hidden pieces of wood. The hidden area where the tree leaves fade out to reveal the alcove was my favorite. Great job!