I really need some good advice on this

[ProjectLopez]

So first off let me state this Link is my rap.
http://www.youtube.com/watch?v=dqXTx17gQYE

eminem is probably the biggest influence on my styling of rapping and complicated and witty word play is what appeals to me most. this was a demo I made for a label they liked it and have told me they want 2 more demos to see my range before making a decision. I would like any constructive criticism on it or anything that would help. if your going to just talk shit open a new tab and go to redtube instead
muchas gracias!