I dont get it. Wheres the puzzle? You cant interact with anything and you cant walk anywhere else but the one room.
Ok, I found the hidden button in the wall, but how having a literally invisible puzzle element without zero prompt just doesnt seem like a good design choice. The rest of the puzzles were understandable enough as soon as I got to them, but that first one I seriously recommend to have a ponder on.
My first insticts were to try and interact with everything that LOOKED like a button, like the back of the chair on the top half or the machinery around the room. I thought, this is the first room, the introduction, surely its going to be something very basic to get you going into the rest of the game and get familiar with the mechanics. How wrong was I when the solution is to walk into a random piece of the wall with no prompt no hint no nothing but just blind luck.
E: Ok now I see it. But the button on the mirrorside is very much so on the edge you really cant tell its a button. Thats why I didnt notice it even on multiple run but now I finally caught a glimpse of it by accident when I wasnt fullscreened.