On a literal in-universe level? No idea, besides the base level "people are being driven towards it in a state of madness" thing (i did think of "her" as being the ocean (or i guess an entity within it but that distinction doesn't really matter imo) (which i think is kind of fun because of the whole deal where historically the ocean has been gendered like that (similarly to boats))).
I think the reason I wasn't left confused/maybe unsatisfied was that I just don't really care to know exactly what events are taking place, especially because from, like, June's perspective, she has no idea what's going on either, and that adds to the horror of it, like "hey what's happening why are these people who i know and love acting like this!?" Like a short story, which is kind of what this is, just in video game format. Then I can try and wrap my head around what I think is happening on a more thematic/figurative/allegorical level (still working on that one, but I have enough to go off of that I don't feel let down) which is the part I just generally care more about in fiction. It's a balancing situation where if more is explained, it gets less scary, which is bad for a horror game, and maybe it doesn't work as well as a vehicle for whatever themes the author is trying to communicate, but also the audience is left hanging on some points that they'd maybe really rather not be. I don't know. word vomit reply. tldr i'm as unsure as everyone else on some key points i'm just coming from a different angle i guess which makes me fine with it (and both ways are fine obviously etc. and my previous comment was maybe a little misworded lol)