Thought i'd try and help out.
It sounds as if you've put quite alot of effort in to making this, and it shows. It's well produced. You've put the effort in to making the song interesting with plenty happening to keep the listener interested. However there are a few improvements.
Drums - You've got a nice percussion feel going on. It's interesting and energetic. However I do feel as if you need to boost the lower frequencies for the bass kick to really stand out. As well as this you could do with playing around with the snare frequencies and try and get a more punchy sound. Other than that, the drums are brilliant.
Bass - You really need to be a little bolder with the bass. It sounds wicked, but it simply isn't loud enough. Other than that it's quality.
Melody - Sounds alright, but I reckon with a bit of playing around you could create something which is a little more catchy.
Samples - Quality
Over-all structure, wicked.
This is a really great piece of music. I'm pretty jealous. Hope i've helped a little bit and i'm looking forward to hearing the finished product.
Good luck man, James