Preaching to the choir here, but this was a really good game! One of the few that I've actually bothered playing until the end, so great work. :) I think given the short time frame with Compo, a lot of the bells and whistles that would have made the game more polished (ant hit feedback, generator SFX, etc) just got lost because you were running out of time, and I don't really mind overlooking them. It was still an incredibly strong game overall, loved the modeling and especially the animations (which often get overlooked in game jams), and the small story element to it too.
One thing I will point out though, is that the game was challenging until I lost the first generator, after which it got *significantly* easier. While I still had the two generators, I had to manage my time at each generator carefully and constantly have to evaluate which generator was in more trouble. I also had to manage my bullets carefully, since sometimes I'd have to leave a generator in danger while I ran over to get more ammo whenever I was about to run out. However, once I lost the first generator, I lost all of that tactical decision making as well. Since I knew where all the ants were going to go now, all I had to do was camp the one generator and wait for them to come close enough so they'd drop ammo right in front of me.
Anyway though, I still had a crapton of fun playing your game, and can't wait to see what else you make. Awesome entry! :)