Level 0.01, more commonly known as the "The Exit?," is a sublevel of Level 0 appearing as a presumably endless labyrinth of long, mundane hallways; every corridor is superficially consistent, adorned with dull yellow wallpaper, moist carpet, and spaced fluorescent lights. Though retaining a common theme, each corridor is subtly unique (i.e., a slight change in the atmosphere, sudden protuberances from the wall, minuscule changes in the floor's angle, and so forth). Navigation is strictly limited by chance, as hallways seemingly change once a wanderer breaks eye contact.

The lighting system of Level 0.01 is relatively poor, habitually flickering and sometimes shutting off entirely. Furthermore, these panels negatively impact one's mental health; staring into the light for extended periods may cause mental disorientation, deterioration of rationalization, et cetera. The panels' hum has been reported to cause a nullification of one's sensory organs; this effect can be temporarily negated with Almond Water.

Throughout Level 0.01, random objects can be found, such as empty bottles, tattered shoes, broken flashlights, and so forth. However, currently, no two living beings have directly come into contact. Furthermore, all lines of contact immediately cut off upon entry, inconveniencing documentation of the level's properties.

Numerous accounts have described a gradual deterioration in the level's quality as they wander farther into the ceaseless depths, depicting a consistent increase in lighting failures, broken walls, and a metallic odor. Additionally, visual and auditory hallucinations begin to increase as one's mental health falters over time. This includes the manifestation of false exits, misplaced doors, nonexistent figures, et cetera. After a certain point, exploring further into Level 0.01 may become infeasible for a variety of reasons