There are two kinds of backrooms games, with no in between :
Walking simulator : eerie atmosphere, it feels good to explore but loses its impact once you realise there is nothing lurking around.
Friendslop game with 28018 entities, no fun in exploring the environment.
I legit really hope someone can make a definitive Backrooms game one day.
There's a lot of good Backrooms games but I still feel like we've not gotten one that really gets it like Kane Persons series does.