Not bad...

To be honest, when you said chopped n' skrewed, 1. T-Pain came in my head and 2. I expected a remidial instrumental. I was definitely wrong. You do know what you're doing, just a few things. I really like your main line and I think you should have built off of the line itself (eg. countermelodies), using it as more of a guideline for the direction of the song. The brass would have worked better in a song with a faster tempo; to be honest, I didn't like it that much, but that's just a matter of opinion. One last thing, to really contribute to the atmosphere, I would have dropped the snare and left just the clap.