Well, this is my first time doing a Ludum Dare, so hopefully I’ll be able to finish in time.
That said, here’s a bit of progress I’ve made so far (controls are WASD, aim with mouse):
http://dl.dropbox.com/u/2149322/Ludum%20Dare%2018/LD18.exe

The idea is a top-down rotational shoot-’em-up. When an enemy is killed, it becomes deactivated, leaving it motionless and unable to fire. However, it attaches to your ship when you touch it and then fires whatever it was firing before. Essentially, you’re “converting” enemy units to your team. I think I could get some cool things going on here, but if anybody has any feedback or suggestions, that would be great.