Hmm, it's a bit confusing and I dunno if I had the best experience (my character died on a zone transition so I couldn't see their corpse and such and I found the camping and objectives confusing), but from what I gathered, it's a bit of a constant loop of hide n' seek where you go into a world and you see the footprints of someone's previous session where they found someone else's corpse and where they planted the artifact and you do the same things following their trail, inevitably passing it onto someone else to find your corpse and artifact. If that's right, it's certainly an interesting concept and a clever take on multiplayer similar to something like Dark Souls, and apart from that it has some interesting presentation and a somber atmosphere, accented by some cool effects like the time/shadow system.
At the end of the day, however, this felt like more like a prototype for proving the concept of this chain letter-esque footprint/artifact/corpse loop: impressive in terms of multiplayer functionality, but unfortunately not really fun as a game as-is. The world just felt too small, the hide n' seek was very simple and boring, the token combat felt pointless, the transitions to camping felt sudden and jarring: real style over substance type stuff. While the lack of explicit instructions could be seen as a negative, I did think it added a sense of mystery and intrigue to it all. It's a good concept at heart, and I would love to see this concept grown into something bigger, similar to a game like Journey or what-not!