Really good on the large scale!
Few problems with the smaller particles tho.
Size of particles from biggest to smallest: Top, Bottom, Charm, Strange, Down, Up (I believe you got them backwards)... (Source: Wikipedia and http://3.bp.blogspot.com/_M0jx8Outk4Q/TOUUOBQaSaI/AAAAAAAAAFg/yxHs0I89Mrg/s1600/SMMassSize.png)

Great animation and great music! Looking forward to further improvements!

As great as usual, particularly the intro!
I think you got the perfect balance between the bass and the melody!
I also feel like a loop version of this can fit into a video game really well.
5/5, 10/10
Keep up the great work!

This is just AWESOME!
In my opinion, all 8-bits sounds a bit cheesy, but this song is the best cheesy song I've ever heard.
The original was awesome, and this just adds another level to awesomeness.
Definitely 5 stars and favorite/download.
BTW nicely done by ear.