It's ok, good mixing.
Believe it or not, but most of hiroshima's casualties were from the fact that the explosion was such a high pitch, people could only feel a mild vibration from it within the first 70 miles, after that, there's a screech.
as for the song, It's ok, I use the same program you use, maybe I could give you some useful stuff for it. My advice is to make some original tracks and not use loops, A)if you ever go out for a record contract, you have to give credit to EVERYONE O.o, and B)the "feelgood" factor of making something of your own :P
My little synaspis:Although there's not alot of originality since you used riffs, It's a good overall idea for your ability to mix beats. Concentrate on using some FX, they really make the song a song lol.
AIM me for some stuff, I'm sure I'll be able to get you some stuff for a good kick-start :) AIM= TheCometCE