Really nice bass coming in at the drop; I also liked how the bass got more complex as the song progressed. The sub was also pretty chill. I do think that the upper-mid melody line you have in the breakdown could have been modulated/changed and then added to the main sections of the song, as there was plenty of room in those frequencies; it would provide a nice counterpoint to the bass.
But that's the only real criticism I could think of. It's very good work.