Gravity Flock

I wanted to make a gravitation simulation and played around a bit with it. I discovered that, with a bit of tweaking, it was controllable. I made this game quite quickly but it is surprisingly addictive once you get over the (arguably steep) learning curve.

I'd really like to hear what other people think of this and welcome comments. Most of all, I hope people will enjoy it!

NEW VERSION 2009-12-27:
- Fixed a couple of critical bugs that had crept in to the last update.
- Made the main engine much more efficient and fast with less calculations per second.
- Fixed a few non-critical but ugly things that had been bothering me.

NEW VERSION 2009-12-25:
Christmas fun, some sounds at last and a slightly tuned down difficulty level as well as the ability to keep playing after the time limit has expired. I hope you enjoy!

There is no sound in outer space... but some music...