Don't use chromatics.
Gamergod1995 down there has it right, it needs a LOT more. Here, I dl'd it and played around for like 5 mins and came up with this as an example of what you could do with it:
Awesome sounding melody though, it just needs to be used in some way that it utilizes it's full badass potential.
well it had a decent bone structure.
It's pretty empty and repetitive though. Learn to make more than one thing. You need a bass, a melody, background noise, a beat, and then maybe a 2 melody. The key is putting all of those things together while still making it sound good.
Okay. I am trying to figure all this stuff out.. the only musical experience i have had is in guitar and elementry school music clases