I know every person's interpretation...
...of music is different, but I can't help but think that your video could've benefited from the inclusion of some warmer colors (yellows, oranges, reds) amongst the cool colors (blues, greens) you used, particularly in the more-
energetic bits of the musical piece. There were also some parts in which some rectangles weren't completely erased before new shapes were drawn, and seemed to me that they should have been erased.
Still, nice to see someone doing this sort of work.