So, I think that Level 71 and TH3 SH4DY GR3Y are connected. This is because in TH3 SH4DY GR3Y's Level 3Three I think it is, it says there are Fallen Angels that get pissed when you mention Level 71, and Level 71 has a portion in the (official?) wiki (http://backrooms-wiki.wikidot.com/level-71) where there is some person in Level 71 and it is telling him to fade, accept fate, ascend. Maybe fade means to become one with the darkness that is Level 71, fate means to die, and ascend means to become on of the Fallen Angels in TH3 SH4DY GR3Y. It would also make sense why they get mad when you mention the level because it seems like it was a painful experience because it says things like I can't breathe. In the beggining of the whole thing it also shows SH4DY in malformed text, witch the SH4DY in TH3 SH4DY GR3Y are the entities, the fallen, maybe the Fallen Angels were the ones who were good and the others like the Home Owner in 2Two are those sinned, or something bad. In the article the malformed text says the things mentioned earlier like fade, fate, ascend, and flow. This might be the level speaking to him/her to get him to "ascend" flow might mean the process of "ascending".