I like the idea of a cooperative-yet-competitive relationship with the other groups living on the turtle. You all need to work together to feed the turtle, otherwise you all suffer. However, maybe one group will benifit more from having the turtle pass through a rainstorm, but it'll cause flooding and/or crop failures for another group. So there's some competitiveness in steering the turtle. Or maybe one group benifits by having the turtle languish in a sunny spot, making it go slow by nearly starving it, but another group needs wind for their windmills and wants the turtle to move quickly.

Regional resources could get depleted if the turtle hangs out in one area too long, or maybe pollution or something builds up, so that encourages players to want the turtle to move around more and not revisit the same areas very frequently.

Finally (and into serious feature-creep mode) what happens when the turtle encounters hazards? Creatures that attack the turtle or dispatch "parasites" that attack the people living on its back? What if you encounter another turtle with its own host of civilizations? Will there be conflict or cooperation? ...so many possibilities!

This is excellent and has me craving more! I like the world that you've built so far

In your opinion, which state makes it easiest to vote? I'm from Colorado, and I'm a big fan of our process where we mail every registered voter their ballot at least a month before election day. Voters can return the ballot by mail, drop it off at any secure drop-box which are located at libraries, schools, and many other municipal buildings throughout every town throughout the state up until the afternoon of election day, or they can choose to show up in person on election day and vote at a polling place.