Forgot to add comment for when I played long ago, but I still remember it was a very interesting game :)
Just wanted to share something I read long before, that we don't think about while it looks quite natural actually: the matter (or was it just the cells?) of our whole bodies is already changing. For what I remember, our skin is completely new in 3 days, and in 15 years it's our whole body that is renewed (but there might be exceptions I don't remember, like maybe the eyes?)!
So the Ship of Theseus might be already here... :o