Grow-bots!
Well, this is it, my final submission! I didn't quite get to implement everything I planned, but it gives you a pretty good impression of the game. I had quite a bit of trouble tweaking the values to make it playable, so it gets a little hairy as you keep playing. I tried to explain everything I could in the README.txt, so be sure to read that first. Pressing F1 during the game will also show you the keys used to play the game.Download it here
Here's a recent screenshot: