I love Blue Prince so much I'm going to spend the next 1,500 words or so telling you as little about it as possible. Unraveling its many mysteries and solving its multitude of puzzles—several of which I'm still working on even after finishing the game—is best done if you go in with nearly no information. Don't watch videos. Don't Google solutions. Don't even finish reading this review. Just go play it.
Seconding this. Don't know if the rest of the review is any good as I stopped reading there.
I'm only 11 hours in to the game so far and feel like I've barely scratched the surface. This game is incredible.