I love the concept and aesthetics here! Although it's short, I think the game is for the most part well-scoped and executed for a jam this size.
I encountered a few bugs and found the UI a little awkward (I couldn't produce multiple farms without going back to a city for more workers even if I had more than 20 workers in my army, sometimes the re-equip button didn't work, etc.), but on the whole enjoyed what's happening here.
The story was cute, and right up until it ended, I was enjoying growing my civilisation and exploring the world. I ended up playing through a few times to try different approaches, and while there wasn't a lot of breadth of viable strategies, it was still fun.
I'd love to play a larger version of this game with more non-combat roles (perhaps support personnel that helps the army move faster, comms roles that allow some interactions with cities from a distance, etc.) and some more music.
It's always great to see a project with sources available, though I am not certain that including the GUI sounds in there is compatible with Sound Jay's terms.