Incredible experience. Love the soundtrack. It was almost impenetrably dense, though, to me - I do enjoy an esoteric game that's hard to figure out, and I do not count myself as quite the smartest at figuring things out, but I don't think I would have realized there was anything to figure out if I hadn't been motivated to keep plumbing its depths by having seen that one comment before mine calling it one of the best games they'd ever played. YMMV, though.
I feel like there's more to crack that I haven't figured out, though. I've found the church with the bow symbol that raises your speed, and solved each bow puzzle in each dream world, but I haven't been able to find anything past that, if there even is anything.