I don't know if or how far you've moved on in life, but this is genuinely a sweet concept for a little god/nature sim combo! If you were still working on it, it'd be neat if there was a compiled set of stats you could check for the world population at a given time.
If you decide not to return to this game, releasing its base code/source files on something like GitHub for others to tinker with and expand upon would be fantastic! ^^