First, I gotta see if I have cellular reception. Most likely, if the backrooms exists in this universe, then a certain squad does too, so, what do I do? Call the Ghostbusters, they deal with all kinds of spooky paranormal bullshit.
If I don't have cellular reception or if they don't exist in that universe, then in that case, I try to run at a wall as fast as I can, so I go to level ! As punishment, but then I get freaky with one of the entities so I get banned from the backrooms. Bam.