Aaand I'm out.
Well, it's been a great weekend, and a few extra hours this evening, but I've not been able to make enough of a game to actually really submit, so I'm calling it here and going to bed, before work tomorrow.
I have done a quick video update of where I got to and what I wanted to do, and partly why I fell short: https://www.youtube.com/watch?v=WLOfBWSHJm0
Maybe I'll continue to play with it more after.
I hope everyone else enjoyed their jam, and I look forward to playing some games!
Edit: Source if anyone's interested: https://github.com/beforan/ld38-populization/tree/develop