Level 1 is the second level of The Backrooms and is made to resemble an empty warehouse.
Evendoe it's named "Habitable Zone" not a lot of entities are present within the level, and this level is also the entrance to The Hub and is also a good place to get items, as the items are in crates that can be found throughout the level.
And it isn't really that complicated to escape this level either, as it is pretty much similar to Level 0.
Jake: "Where the hell have I ended up?"
John: "Dude, we're in Level 1, maybe well find some good supplies"
Jake: "Hopefully..."
Spawning from the amazing ad campaign from the hit game Mafia City, a Level 1 Crook is the lowest level character and regarded as inferior to the much better character, Level 35 Boss. The term Level 1 Crook can be used as an insult meaning that someone is inferior to you (implying you are the Level 35 Boss and they are the Level 1 Crook).
Greg: Yo did you hear the new Sheck Wes song Mo Bamba?
Evan: Shut the fuck up you Level 1 Crook.