Haha...yeah this song is really awesome.
I really like the violin (or something, I'm not good with instruments) at 0:20. It reminds me of the intro music of the show Firefly if you're familiar with it - it was a space themed show with some sweet violin going.
Call me weird but one of my favorite parts of the song is the industry section, mainly because of that big snare. I felt like it worked really well to create the ambience you were going for.
I also like the Starlight City sections - I mean, that's the point of the song right, I would hope those would be the best parts. The grooving organ section is really sweet.
However the mixing is very odd. Let me explain. Normally in a chorus section I would expect the lead melody to be a bit louder than the rest of the song, so it stands out. (Classic example is vocals, which are always mixed pretty loud vs the rest of the song.) However the groovy organ doesn't stand out at all, and so the first time I listened through I almost missed it(!).
My other point of critique is that the volume levels throughout the whole song seem pretty flat. I would suggest to make the chorus a bit louder than the rest, which would make it stand out a little more. Having the calming sections be as loud as the chorus doesn't work for me because they aren't actually calming if they continue to be as loud as the other sections.
Apart from that this song is ballin. The mixing is really well done like you said, and apart from my points up above I can't find any problems with it. The grooving sections are awesome. The attention to detail is pretty crazy, with the birds chirping and the great synth lines at :37. Awesome work!