After leaving the Neighbor's house for the first time near the start of the game, a number between 1 and 13 known as the "WTF value" is generated in the game's code. This value functions similarly to the "fun value" in Undertale and decides the outcome of multiple events in the game. A full list of known WTF value events (as of February 5, 2021) can be found in the attached picture and source link.

Spoiler:An event near the end of the game featuring the hidden dialogue "I fucking love air conditioning." contains the only expletive in the game's script.
Contributed by MehDeletingLater