Maybe it's not as obvious as I thought. I hate artist's statements, and I don't want to post one here, but if you're really curious, here is the reason I won't answer that particular question:
[spoiler]There are certain things about TSoG and the events that transpire during it that I have deliberately chosen to leave ambiguous. In particular, I've avoided providing a definitive answer to the question of whether Yawah exists. In my view, spelling out a clear yes-or-no answer to this question would cheapen the game by detracting from the ideas the player is meant to grapple with; in my view, whether Yawah really exists is actually subordinate to those other ideas.[/spoiler]