I think I missed the first half of the code you need to get into the staff room in the hospital, and now I'm not sure what to do because I can't find it anywhere and I can't go anywhere other than the main lobby, cafeteria, floor 1,and floor 3. I really dont want to replay the game since I'm hours into it at this point, but I don't think there's any way to go back if I really missed it :( Is there still a way to get it?