Nice piece man, only way you'll improve is if you keep bangin stuff out !
I like this piece so take my post as constructive criticism from another viewers perspective
Text: Color choice, Blending, font choice etc... Not bad at all, buttttt the placement seems a bit off to me its taking away from the focal being next to the face of wiz.
Background: Again not bad at all, Im into using the space type shit in my work too, but its kind of random lol, like hes just chillen in space(probably stoned a fck haha) and like jinx said that white line is bothering the crap outta me lol.
Lighting: the lighting is kind of weird, but it seems like you might have used to moon as the light source in a way so you got the idea just gotta improve on it.
Focal: Blending is good, I dig the little extra effects & stuff on the bottom that gives it a flashy feel. I would sharpen face, chain and tatts and slowly blur out the bg and it would stick out more.
7/10
with adjustments could be closer to 8.5-9/10, keep up the goodwork man !