You've really got something here. The only things I can comment on are that the opening gets a bit repetitive 0:45 to 1:36. There are a few melody changes but i think some instrumental change might help make it more enjoyable. Besides that it's a pretty good song and keep up the good work!
I can see what you mean about the main section there. I guess I fell a little too in love with the growling bass. I could probably have lengthened the song as well, had I thrown different bits between the bass phrases. Thanks a lot for your feedback, it's much appreciated. :)
Please contact me if you would like to use this in a project. We can discuss the details.