Clean and simple, Just how I like it. What resolution are you using for the panel? The artwork seems to lack sharpness which may just be compression but could be that the original artwork is not High enough res.
The Button Halo's, is that really how you plan on laying out the buttons, the angle looks a little severe. And I am not sure the bottom left button would clear the joystick plate. Have you looked at the templates from slagcoin?