Some rough spots on Samus' Armor, and behind it. Try using the smudge tool to take care of that, but use it lightly on those edges. Also, try a different lighting effect/lens flare on her blaster, some of the lower flares, and a gradient should suffice.
Best friends in PS:
Gradient, Motion Blur, and everyone's favorite, Overlay effects.
Nice overall, especially for a first go.