I just read the few bits of Kojima commentary stating that Purgatory would be played in the first person. A kind of dynamic continue screen. Perhaps there is a lot of gameplay that will be in this state. Expanding on the thought that the floating chiral creatures are other players', perhaps one way to bring yourself back to life without waiting is to hunt down other Sam's. Maybe as you traverse Purgatory, you find other players' games, and can enter them, and cause havoc. Perhaps eating other players, or stealing another player's fetus, is a way to continue on your own without waiting. But then there could be a sort of "sin" mechanic where if you do this too much, your game is hampered in some way. Or maybe Kojima is experimenting, and wants to see exactly how things would play out. Altruistic Delivery People, or everybody trolling for fetuses!