Also, whatever happened to that screen package that used to come with microsoft music players 10 years ago. I can't for the life of me remember what it was called. I was a kind of dynamic, ever changing mix of patterns, colors, auras, etc, a spirograph on LSD.
More likely than not you are thinking of Milk Drop (or possibly Gauss, which has been incorporated into the new version of MilkDrop). It comes free with Winamp free version. Check it out then select it as your visualization in settings and you can play it while listening to music in Winamp. It has beat detect so it "goes" with the music sorta.
heres and example: http://www.youtube.com/watch?v=CpWK42eCTyU
Also, GREAT GAME!!! Why no more support or new tracks? this game needs to be doin better!!