Darn it!
LunacyEcho has already said pretty much everything I could possibly mention -_-
I think you're definitely getting better with both your melodies and your production! The rhythmic aspects of this piece far exceed my capabilities XD (Meaning I couldn't come up with as creative use of percussion and rhythm).
It's good that you're exploring new keys. It's even better to try them all out every once in a while :p
I like your use of intruments. Some of them sound almost like they'd belong in some crash game (especially the older ones).
I can really feel the bass in this piece too!
I actually like the fading out at the end; it kinda fits this piece, so good job with that ;)
There's a lot in common between math and music. It's very interesting to think in mathematical patterns while writing songs. I could show you another numberphile video about pi, but I think you might find this interesting as well: http://www.youtube.com/watch?v=4niz8TfY794&list=UUOGeU-1Fig3rrDjhm9Zs_wg
Hmphm. I guess I'll just have to try to get to your next piece before LunacyEcho shows up with a massive review :/
What I still can say though is; amazing job, and keep it up ;)