Nice one, I can see that working well .
If I could offer one suggestion, that you add some reverb to your synths, in particular the one that features from the intro onward. The mix is too in your face and personal for your games setting so reverb would open it up and give it a more ethereal space like feeling.
Actually i'm just thinking about it, if you have an ambient loop playing aswell as the music it might all meld together and give the desired effect without reverb.
Anyway heres some stuff I have floating around.
This was from a sound design thing I had to do for school, I stripped out the dialog to upload here.
I was going for that Hans Zimmer big blockbuster thing. Id like to do more stuff like it in a game.
https://www.dropbox.com/s/bwo3uf7vgol9sv4/AmbientMusic.mp3
This is just a little portion of an idea. It distorts digitally and stuff so its not too pretty yet but its something I kind of want to show.
https://www.dropbox.com/s/zcp7tw45or8pqyu/Vista2.wav