Amazing game. Great concept and art style. Super fun and perfect game length IMO. My only criticism would be to give players more tips/warnings about the monsters. I died to multiple monsters because I did not understand them, which was fine and kind of scary but awesome! But I recommend adding checkpoints or some kind of way to regain a portion of your time spent before you died if you want to keep the mechanics of the monsters a surprise. It was annoying losing all of my progress multiple times because I could not understand how the enemies worked.
So basically, keep the mechanics of each monster a surprise but add a sort of checkpoint system, or give some information about the enemies before it's too late.
The first warning the crow gives you is great! I am not that quick with understanding objectives though, so this may be more on me. Fantastic all around though.