The Hallway is the location of the intermediate to advanced puzzles on the LEVELS site. Hallway puzzles take the form of doors, with each door leading to a puzzle.
The Hallway can be accessed either through the sidebar, or by going down the Rabbithole. The Hallway is located at the bottom of the Rabbithole.
Puzzles in the Hallway can be accessed without logging in, although logging in will allow users to save which puzzles they have completed.