The dressing screen that uses Sophia in the scene is called 'changing screen'. The door between the two rooms is called 'exit'. It has also been discovered that this room also contains a clever nod to Maniac Mansion by labeling the fern in the corner as 'Chuck'. This part of Sophia's office was probably meant to be fully playable with Sophia entering the other room. The room to the right of Sophia Hapgood's office isn't accessible in the game, and is only used for a cutscene. There are a few places that are unused in the final game, with most of them located in the cave of Knossos. (Source: Endy/Ender, bgbennyboy) Unused Rooms
At any time Indiana Jones is on the screen, press one of the following key combinations: After booting up the game, enter shinymetal on the keyboard.