The music is great but doesn't feel like it fits the tone all the time. Obviously you'll be adding more music as you go so that's a moot point.
The art is beautiful and playing the menus felt really satisfying and intuitive, a couple of the buttons don't work but I'm assuming you know which (volume on the in-game menu and the 'h' hint system).
Changing the palette was really cool
All in all I'm super excited about this game. It crashed on me so I stopped playing and some of the alliteration was a bit silly and spoiled the horror effect, but yeah. Game is cool. Can't wait to play this, and I could legitimately see you monetising this in the future.