This is awesome!!
It reminds me of the old music screensavers, therefore I was thinking "man, would be cool to have it in full-screen and be able to turn off the music". A bit of clicking later I find out that you already can do that, not the first time I think of something that's already implemented. I'm not one to spend too much time with simulators like this, but I can see myself just randomly setting out stuff with different colored trails and watch it draw pretty pictures in full-screen while listening to some music.