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Spooky greets the protagonist in the first room, Room 0; her cute appearance and humorous dialogue may lead one to believe that this is going to be a harmless parody game that pokes fun at other horror game clichés. She explains the main goal of the game: to make it through 1000 rooms alive. Afterwards, she flies through the ceiling.
In the first 50 rooms, no monsters or death traps appear, and the only jumpscares are Specimen 1, which may cause one to completely drop their guard. The first and only indicator that things are not as they seem are the notes that appear randomly on Specimen 1 and furniture which tell ominous accounts of the previous travelers of the mansion. Once the protagonist reaches Room 50, which is an elevator, they are rewarded with a save point before pressing the button and continuing to the next floor. This is where things begin to change.
In this section, dark maze-like rooms surrounded by abysses begin to appear, as well as out of place objects such as the Brainframe Room. However, the real scares don't begin until the protagonist reaches Room 60, a large room with a mysterious black and green puddle in the center and a note on a table that reads:
Innards, Ingest, Invoking.Nailing, Never, stops the Choking"
Once the protagonist puts the note down, a loud choking sound is heard; this is the indicator that Specimen 2, the first hostile enemy in the game, has appeared. It must be avoided at all costs. The protagonist is then chased by Specimen 2 through several rooms, which during the pursuit, have black and green puddles on the floor that slow the protagonist down and increase the chances of getting caught. Once the chase ends, the rooms continue as normal until the next chase, or until Room 100, which is another save room/elevator.