The sound design is okay. A good few of your sounds are a bit boring, and could be far more interesting. Also, I don't quite think that the base starting at 1:00 meshes the best with the rest of the song, but that may well just be me.
The structure and flow of the song is pretty nice. The intro and outro are wonderful, and the transitions are fantastic. The one part that stands out like a sore thumb to me, however, is 1:28-2:07. Even though the transitions are good, that part doesn't feel like it flows with the rest of the song.
I feel as though the percussion could benefit from some sidechaining, particularly the snare around :56. Otherwise, the percussion seems very nice.
You should be proud of the composition, even accounting for the middle segment, it's by far your strongest point in this song. You also didn't do that badly with sound design, even with using an unfamiliar synth.
Very nice to see another song from you, it's been a while. Welcome back.