A little "sharp"

I think the electric guitar (distortion guitar?) outstands too much. :) You could add extra musical intruments to sustain the unison of the song. :D

It's cool and catchy anyway though.

Well

I can see that you have the basic idea. FL Slayer is very unforfilling though when it comes to making rock / metal riffs with it. Try putting the bass punch behind it even if it is the same thing it will give it the sound it needs. Even putting a drawn out "choir" from the FL synth will give it some attitude. keep it up. You can do it, I know you can.