I've been playing this game madly for a couple of days and, although I'm still -400 cubits through, I need to say this is a masterpiece.
Loving the whole philosophical and spiritual strangeness blended with good old 2000s weird anime vibe. If you're into dungeon crawling, roguelikes and eccentric story, trust me: you really, really gotta play this game.
And just a quick side note in case anyone, like me, couldn't play it at first because PCSX2 would boot the ISO into a black screen. After I disabled MTVU (Config > Emulation Settings > Speedhacks > MTVU) it worked liked charm.