Huh. I thought the orange rooms were basically any of the staff-only rooms. Oh, and I knew that the blue rooms contained math notebooks, but because the notebook type spawns are so random, and the fact that I rarely explore the bottom half of the map, I didn't know which rooms contained which notebook. I want to try being the first to get the language level ending WITHOUT Viktor, because no one has done that yet, and I think there is an achievement for it. I want to be on the leaderboard for that.