Fact 1: In the Tutorial / Starter's Off cutscene, Machi was from one of the real scratch projects called "Her Dreams" created by the user, "Ryanthescreamerfan70." It shows her talking about picking up roses and about her dreams but it slowly getting dark as she's depressed talking about how everyone don't need her and hurt her dreams. She grabs the knife out and commits suicide, then it cuts to the screamer and the project ends. The project was taken down but the file was still available in the Screamer Wiki.
https://screamer.wiki/Her_dreams

Fact 2: The poster was seen with Felicita was in it and with the character "Lunatic The Skeleton" was based on the youtuber called "This Little Lunatic" where he talks about reviews on disturbing movies, talks about topics of murder or crime events, disturbing videos and websites and shock mixtapes and has reactions while watching shock videos. I will recommend to check him out since his content was good and it can teach you how to be careful around the internet with one of those "trolls."
https://www.youtube.com/@thislittlelunatic6977/featured

Fact 3: The jiggle that plays at the end of the Game Over screen in the Starter's Off, was from the website, "Liquid Generations." It's a website where you can send screamers to your friends where you troll but in the end of the screamers, it shows a ninja coming out with a jingle with the text, "You've been sabotaged!" in every single screamers happens. The website was used to shut down but the website was revived but there's no screamers remains.
https://www.youtube.com/watch?si=wBWjfzsquvxSWK8R&t=294&v=nDGJUpHvaRo&feature=youtu.be

And that's all of the facts that I will explaining the facts of the Tutorial, I will not told you all of the facts including the meaning of real facts well, since it's going to be too much, I will decided to safe that when we get the game done! Thank you for reading!