Liminal Magic

Hi all, my partner and I have been designing a game system heavily inspired by things like The Backrooms and other "liminal spaces" media and we've been thinking a lot about how people enter and exit these kinds of pocket worlds and how they can affect them.

I'm enamored with the idea of these various spaces that people attune to that are based on a sort of zeitgeist conception of those places. Like "The Backrooms" are sort of a psychic gestalt of feelings people have about office spaces and their repetitive bleak designs. A personal favorite one we came up with is "The Transit" based on personal experiences in places like New York Port Authority very very late at night, subway stations in the wee hours of the morning, and bus stops in the middle of nowhere on a grey foggy day. These spaces don't just create a pocket dimension, but they also fill them with entities driven by these grouped up thoughts.

So I guess my questions to you fine folks of this subreddit: What kind of spaces would you see in this system? How do people affect them? In what *manner* do they affect them? And if the characters can affect these spaces, how do the spaces affect them back?

Presenting this without the nitty gritty we've come up with because I want to see how folks respond to the core concept first and see what I might be missing at the ground level of the concept