I feel so stupid but I'm already stuck on the safe puzzle, I've tried everything I can think of related to the piece of paper but am getting nowhere. Please help!
If you're talking about level one then my advice would be that every wall in a room has a purpose. The piece of paper may not help you open the safe but it may help you get something that will.
I like the aethetic, and everything seems to work right, but honestly, the puzzles are very obtuse, right down to the first one. I know this makes sense in your mind, because you came up with it, but for someone outside, we need something to ease us into your logic.