I haven't finished the game yet, but I don't know if I'll be able to. :/ The description is... certainly right about the objectives being obtuse, at least. I do really love the atmosphere and the art direction and such! The beginning was very nice. But I have almost the entire map unlocked by now, and I've scoured everything multiple times, and I just feel like at this point I'm wandering through the same areas over and over trying to find something I've missed. There is no direction or objective, so there's nothing to really point me where I'm supposed to go or what I'm supposed to be doing. It's quite frustrating. Even the things I *have* unlocked, have sometimes seemed to lead me nowhere and not really accomplish anything? But maybe that's just because I'm missing something again. It's a huge game, so even when I did resort to looking for a walkthrough in order to progress, the other player had done things out of order from me, and I struggled to find where they had gotten things I had missed. Even now, I'm not entirely sure what's going on or who the characters are either, and so I don't feel particularly invested in them. Maybe it would all come together later on in the game, but again, I don't know if I'll be able to make it to that point.
TL;DR: An open-world puzzle game is fascinating in theory, but I wish it was perhaps broken into multiple smaller goals with or something.