Primordial Guard was the game I made for Ludum Dare 24 (October 2012). Unfortunately I only had 12 hours available to make the game...
The theme was evolution so I decided I wanted to try out making some enemies based on genetic algorithms. Ended up spending almost 4 hours just to get them to behave :-)
The game was made using C++ and SFML.
A little video of me playing the game