Very beautiful and I think you succeeded at making it really Myst-like (and mist-like, considering the amount of fog 😂). I was a bit disappointed that it ended when it did, but only because I really wanted to keep on playing. Nice work!
Had a few times where I got stuck in the landscape (most of the times I was able to get out of it my just moving/running back and forth until the game let me pass, one time I couldn't and had to restart - it seems to happen after loading, then I can no longer pass the Witch's Hand in either direction).