I'm anything but a backrooms fan but I particularly enjoyed this movie. I think it's best appreciated coming from the perspective that the backrooms is one of those ownerless shared fiction universes that almost never get adaptions with any sort of budget behind it for obvious reasons, much less when they have very niche or novel premises like 'noclipping out of reality to end up in procgen horror hallways'
I was keen to watch it because it made me fantasize that we might get some decent money behind an SCP project one day, they feel like very similar universes in how they have evolved.