I absolutely agree with everyone else here saying that the visuals are amazing. It's extremely impressive how good everything looks! The game also gave me a sense of eeriness the whole time, like something was off (in a good way of course).
The puzzles were a little too difficult to figure out though. I was able to figure out the first room after some time, but the second room(s) had me completely stumped, until...
(Spoilers) I was actually able to beat the game, but I think I skipped A LOT of the puzzles to get to the end. I figured the game room was a hint to the knight to king puzzle, but I wasn't a chess player so I just brute forced the puzzle lol. That led me to the horse room, which then I used to get the gold key from the skeleton robot. I completely skipped the puzzles involving the codes, the directional button thing, and the computer.
Though despite the sequence breaking, the game was fantastic all the way through! I loved the visuals and the mood they set up. Difficulty aside, the puzzles were really well thought out! Great job on the game overall!
Edit: Also wanted to mention that the horse room was one of my favorite moments. Really got me anxious for the time I was in there.