Attempt at GFXing

[iBeatz]

I haven't really drawn much graphic art on the computer before. This has pretty much been my first completed graphic I have done on the computer using MS Paint.
I'm a keen artist when it comes to a pencil and page, but I have never done this before, and so I thought I'd give it a go and see how it went.
If you could give me some feedback, and ways to improve the graphic, I would be very appreciative.