This is an amazing game. I had so much fun doing it, and the puzzles were challenging indeed, yet still very doable with logical thinking (not like some puzzle games where you need to do a lot of brute forcing). I have nothing to add other than maybe making the blood splatter persist instead of going away suddenly.
Had so much fun playing the game, looking forward to seeing more of it if you guys decide to expand on this idea. You have so many unique mechanics for this game's setting, and it makes a lot of sense.