The Player

The Player is an unknown person that has entered The Backrooms.

Watch
The player's watch is an essential information tool, as well as the main way for them to stay alive.

It shows the current game time and the distance that one has traversed within The Backrooms.

Every 30 seconds the player can "Remind themself who they are and where they come from". When done on-time, this action increases the player's sanity.

Madness
The player's madness is a measure of the player's accumulated insanity, that also serves as de-facto the player's health.

Its level can be determined by observing the effects that it has on the player.

Levels
While decreasing madness prevents the player from reaching next madness level, its level cannot be reduced and accumulated effects are permanent.[Developer confirmed]

Death
Once the player's madness rises beyond beyond Very High, the player "dies". At that moment, The Backrooms lose power, only for them to regain it shortly after with the lights shining very brightly and the sound glitching. That is a moment of no return and cannot be recovered from.

After a moment, the player noclips beyond The Backrooms.

Trivia

 * The "incomprehensible mumbling" that plays at high madness is reversed and slowed down speaking. The voice is very distorted but reversing it and speeding it up reveals it as something sounding like, "[inaudible] Pie on a Plate Productions so he could quit his job and work full time. Also, buy the Great Geometric Multiverse Tour, it's a great game and [inaudible] share it with all of your friends."