No you're wrong.
I haven't watched "top ten most terrifying things on the DARK WEB" or any of the videos about DARK WEB.
To tell you the truth, I have no idea about DARK WEB thing =)
The inspiration for the game was The Backrooms and Deep Red (italian Profondo rosso) - a cult horror movie by Dario Argento.
That's why I have the title THE DEEP RED ROOMS. That's it.
In addition, every work has a source of inspiration. It's perfectly normal.
About of the themes for the jams... Read the rules of the jams.
Horror Game Jam #13 - my game about an unlucky number and day with number 13 - friday the 13th. Also my game is horror. It all fits.
Liminal Game Jam 2023 - my game about liminal spaces. It all fits.
One Game a Month #24 - my game about night shift. It all fits.
The jam organizers accept my game. They don't mind. Then everything fits. When you create your own game jam, then you can delete my game =)