anon I don't think the test is related to the girl, it's just an acronym for lipoarabinomannan enzyme-linked immunosorbent assay. but her story is super creepy, I remember when another board was all over it trying to decipher the writings on the wall. Also the similarities with the movie. She had scheduled posts on her Tumblr so she kept "posting" after death, creepy stuff.
>the elevator game
It made me think of Urasekai Picnic. It's really the manga for anyone who enjoys urban legends.