What a beautiful game. I honestly don't have that much to say about it because there's not really anything to criticize.
I know it's based on a book but the way you implemented it into a game is very creative and I love the atmosphere (thanks to the great soundtrack as well.)
Figuring out what to do was engaging and never frustrating and I love how half of the game is basically a tutorial for the last stressful challenge.
In a market saturated with mediocrity this really stands out as a gem. I haven't played any games from you so far but this one really makes me want to check out your other works.