The stage itself is pretty frickin' cool. I love the concept.
The only things that stood out to me:
You have no floortension.
The Jay-Z poster is a cool and creative idea. It could use some better blending though, it looks oddly placed there.
Your sprites aren't cropped.
Also, I appreciate the effort on the BGM, but I personally couldn't do it, though i strongly dislike Lil Wayne.