This is the closest to a non-recommendation I can get while still saying the game's worth buying.
I really enjoyed the puzzles, the platforming, the exploration. I like the art style, the audio was mostly good (there were a few volume spikes) and the controls were handled well enough (except for some annoyances in the menus.)
I want to be super clear. This game is unforgiving. Everything, everything
is instant death. This isn't too terrible in most sections, except for the larger rooms where death will set you back to the entrance and it takes a while to get back to the part that's thwarting you.
Where it really starts to hurt is in the boss battles. Yeah, I'm not sure why there are boss battles in what is almost completely non-violent game (a few exceptions, but they're mostly avoidable)
The boss battles are brutal. No checkpoints. Die? You're back to the entrance to the room. Hit? At all? Dead. You're back to the entrance to the room. Any mistake? Any misjudgement? Die. Over and over and over again. Also, I don't know if I'm bad, or the controls just aren't as tight as they should have been, but I found myself dying repeatedly to stuff that I think I should have survived. (I can't be more specific without some spoilers.)
I think that last boss killed me 100+ times before I finally beat him. (Then I had to do it again to get the right ending. Should have picked up all the scrolls the first time D: )
I can honestly say I'll never play this again. But I don't exactly regret it either.
That said, if there's ever a sequel, I'll have to think long and hard about playing it.