you're walking through your house, paying attention to your phone, you bump into the bathroom door... and... you just fall through it...

you're now in Level-0... of the Backrooms...

an couple days later...

you where walking around... kinda tired... when you see an "exit" immediately you run over to it... and open it, and run through.

it was another level of the backrooms. It feels nostalgic, it's like a restaurant's play place you can't see the ends of the room, but your not alone.