Here's what I would suggest.
Turn up the drums a tad bit louder. In rap, you want the drum set to be the loudest section of the song. The samples also need to be better quality (and trust me, I know good samples are hard to find.) I'm also not sure what kind of theme you want this song to have. I will say that you have a lot of good ideas, and I really like the transition to the new melody at the "36 mark. If you mix this up a lil bit, go on and resubmit it. Message me and I'll review it again.