Flying Fearlessly Forever...
What gets me is the music. The loop is just... awesome. It's quite basic underneath, but there's enough layered variation in it that you can just listen to it... forever. I looked briefly at your userpage; it seems you produce a fair bit of audio? I might have to look at getting your album.
The animations are really neat and reminiscent of the demoscene, especially with the procedural generation. Some of them however are quite intensive on processing power and tend to render a bit slowly. I'd love to play this fullscreen, but just don't have the CPU/GPU power.
I found this flash originally on another website - the link is http://thebest404pageever.com/swf/fff ffforever.swf. Since your flash is "approved for NG only", you may want to look into that.