All dimensions Wiki
If you're not careful and noclip out of the bounds of reality, you'll end up in the backrooms, where it's nothing but the stench of old moist carpet, the madness of mono yellow, and approximately six million square miles of empty rooms to be trapped in. God save you if you hear something near by, because it's definitely not human.

Level 0

Level 0 is simple. It has wet, soggy, carpet as flooring, obnoxiously loud fluorescent lights, ceiling tiles, and a yellow hue to all of it. Interactions with other beings are extremely rare, but can happen. If you do make eye contact, look away from it immediately.

Level 1

Level 1 resembles a sprawling warehouse, with boxes that can have some useful items for survival. Level 1 also has puddles that are safe for consumption. In level 1, the lights can flicker and turn off for minutes or even hours at a time. When this occurs, this level becomes more dangerous as entities will start to appear.

Level 2

Level 2 resembles a maintenance tunnel that twists and turns in all directions. The hallways have pipes aligned on the walls, and this level contains many entities. The entities here, are also very violent.

Level 3

Level 3 resembles an electrical station with orange bricks as walls, and dusty concrete as floor and ceiling. This level contains even more entities than level 2. This level contains many supplies on the floors of this level.

Level 4

this is just an office with almond water lol