Man, I love the synths, and how everything works together as a whole. It feels very light weighted and free-ish if you know what I mean. Musically, I have nothing to criticise. The melodies are fantastic, the chords work really well. The track progesses really nicely!
The mix however can use some work. The reverb on some synths is too much. It starts blending with other synths making the mix blurry. I understand that long reverb decay is of major contribution to the abience, but it should not smother the song. Also, I feel like the snare can get some more love. The kick is mixed in really nicely, but the snare sounds kind of strange. Where the kick is clearly audible, the snare gets overpowered by the rest of the track most of the time. Making the snare stand out more, and balancing the kick-snare combination makes for more solid drums.
The stereo image of the song at some parts (especially the parts with the phaser) just messes with my head a bit. I'm listening on headphones, and the left-right separation is crazy at some parts. The idea is great. It's too overdone in my opinion though.
Last but not least is the master. The overall tonality of the audio is focussed really on the highs. The bass is barely audible if not absent. I'm not going to say anything about the bass being absent though, as I can imagine that was done on purpose. A sub bass however, would have super nice in the background here. Back to the master: it's loud constantly! You should check out the waveform in you DAW. The volume is max except for the parts with very few instruments. Listening carefully to the song, some parts sound quite overcompressed.
Except for the mixing and mastering, the song was amazing. I should emphasise that to assure you I loved every second of it even though I had to pick on the quality a bit. But hey, that criticism makes for a useful review. At least, I hope it's useful :P. Nice work here!