The concept is simple but appealing, and i have to say i like the background. However there are a couple of things that could be done better, imho.
First of all there's a black string around his feets, a leftover of the extraction, that really stands out with
that light aura around. You should police the subject layer a little more in that area. Making it "fade" in
the light would do the trick while even giving a more realistic sense.
Also, that aura of light : on its right end is cutted in vertical in a straight line instead of keep fading. Even if the
star covers it a bit it's still quite visible.
I would also make something on the text... it's a matter of tastes, of course, but plain as it is now i feel it doesn't really merge with the picture. Maybe a bit of glow, and maybe some motion blur... something like that, you know, to make it a bit more dynamic.