The term "Strong Language" is misspelled when the ESRB rating is shown at the beginning of the game.
During Interval 04, Chapter 2 (called “Watchers”), you’ll come across a room full of cubicles. Specifically, the room is located to the left of the deceased ATC Officer who was crushed by a falling ceiling tile. If you examine the cubicles in that room, you’ll find one with a radio on it, as well as a red stapler and a TPS report. This is an obvious ode to the classic late-90s movie Office Space.
To unlock all of the levels in the game, insert F3ARDAY1 as your profile name.