Wow. Amazing experience, and the writing and conceptual design reaches what I think is the highest level in cosmic horror: there is something happening that feels completely realized, an entity or force with a shape and a definition and an eternity of history that exists. The story refuses to explain it in full, even implies that the full explanation may be impossible, but at the same time it convinces you that there is a true and complete truth.
That's hard to achieve, but the best cosmic/unknowable horror reaches it, and this game completely delivers. It also describes it with beautiful prose, if prose is even sufficient for such horrific lyricism. I'm speaking specifically of the penultimate (I think, at least) tape where the speaker drones on about the nature of the entity behind all of this. "Every instrument is a chord in its metallic throat," or something like that. Beautiful and haunting stuff.
The presentation was also wondering. This is the kind of project that demonstrates how something that would make an intriguing but very fleeting short story can be catapulting by adding even the most basic level of interacting. I love how much the medium of video games is doing that these days. It really engages my (and I think a lot of people's) attention-starved brains in a way that pure prose can't really do.
Also, we see a lot of games like this are very low-poly or don't put a lot of care into the visual design--and I'm actually fine with that. I don't need amazing visuals. But it's definitely awesome that this game put the effort and care into the visuals and sound design, especially when they could have ridden purely on the prose because it was at such a high level. I would have loved the IF version of this game, but this version is superior and really something special.