Is there a way to make new settlements during the simulation? If not is this something planned going forward?
The simulation doesn't currently support adding new settlements, but that's something we might be able to do in a future release.
Basically there's two ways we could add new settlements: either sending them from Earth or constructing a new settlement on Mars out of local resources from an existing settlement.
I don't think the Martian people put a lot of effort into construction just yet to justify them building new settlements from scratch. We might be able to add new settlements arriving from Earth via the resupply system, however. The resupply tool could be modified to allow the users to schedule a new settlement arrival.
I'll have to discuss it with the group on the developer mailing list.