Something about this game feels off, I don't know what exacly but after you read this you will know. I love the atmosphere, it feels like I was one of characters trapped in the Cube (very good movie btw) but I know who I am and instead of an id card I took with me a whole call of duty arsenal that I couldn't reload. Solving absurd puzzles ranging from jumping on platforms over acid to killing a demon who has more polygons than player character and the room where just by touching crystal clear water player may die and the only hope to survive this is the concrete block.
I don't know why but this game feels unhonest. The assets that you made and picked don't match with each other and with some game breaking bugs your game feels off. If I were you I would focus more on consistency of assets and models used and try to annoy my friends and family members to the point of playtesting my game. This game feels like it was not playtested or some major mistakes weren't spotted while designing project. Almost every room need some improvements like the forsaken acid room and water room. Maybe platforms that turned out to be fake slightly becomes transparent after the restart or instead of acid and hearing for 100th time the death screem player is teleported back to the start and loses some of their health.
I believe your game lacks consisten design and some polish. After changing of some models and fixing the bugs and design mistakes this game will be amazing. But for now I can't say this. But nontheless congratulations on finishing in time and showing your hard work with the world. I believe in honest feedback I I wish I helped understand some things which went wrong. Maybe try to do the same thing with my game? I am curious what you thing about my game too!