Level 0 is the first level in BackRooms 2D, It consists of the same mono yellow walls as in the photo. Level 0 contains one room, the Manilla room, level 0 aside from that contains no entities or items and you enter by(in lore) no-clipping from reality and you exit by touching a green blob on the ground that "takes you" to Level 1 or a door that "takes you" to Level 0.2.