I appreciate the warning about the jumpscare. I'm not a big horror fan, so at least I can be ready about it. (spoiler: I still got jumpscared by it)
Interesting gameplay. It's rare for a horror game to use physics in their gameplay. I think there's a lot of potential here. Though I must say I got a little bit stuck at the end since I don't know how to topple the door like structure. But I managed to figure it out after a few tries.
Another thing that kinda annoys me is how close the cube is to the screen when you're holding it xD. That combined with the horror aspect really kept me on edge, since you don't know if there's a jumpscare waiting for you when you drop the cube.
I can see the correlation between the game and the theme, but with the current state of the game, unfortunately it doesn't really fit well. I can see the vision though.
The art and aesthetic is really nice and atmospheric. I really like how you highlight the movable object with the glow effect, though I figured that out after a while. At first I tried to interact with everything, including the pages and the books xD.
There's really not much audio to rate here, apart from several SFX that's scattered throughout the game. Those are pretty good though. I think a horror game might benefit with a chilling ambience.