The end is acctually not the final game in BackRooms 2D but is just a library with no books and is partially randomely generated(only the background being randomly selected out of several ones without using the slices-method). Partygoers roam the level. You can enter by(in lore) going through a neon door and you can exit by(in lore) touching a glitch blob that takes you to a random level.
THE END IS NEAR