Minimalism?
The more I listen to your music, the more it appears to be in a minimalist tradition. In the minimalist style, which is heavily influential in techno, the song begins with a theme, and then the theme is slowly transformed and added to do or sculpted down until it is completely different. In some minimalist songs, such as Philip Glasses's Metamorphosis 2, the theme builds on itself until the climax, when it begins to fall into its original form. This is also done is AFX's song Analogue Bubblebath.
I thoroughly enjoyed this song, and while I intuitively want to praise it for having counterpoint, I have to admit that I don't really have a technical appreciation of what counterpoint is. All I can say is that qualitatively the melodies work well together. I have to say that I don't really appreciate the noise near the end though. Creating disharmony is essential to the structure of a song, at least to my understanding, but there is a difference between controlled disharmony and noise. I think the song might have been a little bit stronger if the noise had been a bit more carefully designed and a little bit less "noisy".
On a slightly off topic note, I've always wondered why the fugue has fallen out of popularity in modern music. Does it require a concentration that one cannot give when in casual listening? Does it take too much time to appreciate (say, more than the three minutes that a music video has to win over its listener). Is it that the modern audience listens to less music and is less willing to take a risk?