I like this. And after playing with it a while, I think I've (finally) discovered a possible win-condition, but haven't been able to achieve it and so have no idea if you've built it out to respond to such a state. Whether or not intended, trying to achieve sustainable orbits, as though you were building a solar system, seems like an intuitive and worthy goal. (I still haven't figured out what all of the sliders do, so it's been a process of stumbling though the dark with trial and error.)