Glad you like the weird polyrhythm! I was very curious what people think of it, that was the reason I kept it in.
I am very thankful of the feedback! Though I am not very good at musical theory, so could you elaborate what you mean exactly?
Currently the main melody repeats twice before the polyrhythmic part begins (which is also two sections of polyrhythm) - I would imagine that this would give an AABB idea, not AAAB? And 'sustain' relates to the notes of a piano (or organ or other) being held, correct? Or do you mean something different? Some help would be appreciated :)