This is pretty solid - I can easily envision it in the context you've described. It has that kind of quality to it that makes it easy to get lost in. Tuning out the world around and imagining it as an aural backdrop while playing the game helps to really put it in context and appreciate the gradual progression throughout the track.
There's a nice variety of voicings and patches that continue to add some intrigue with each and every layer that comes and goes. Good use of panning to really put the stereo-field to use, too. I like the little dips we get with the filters past the half-way point, they do a good job of providing some more motion and break the standard rhythm up a little to keep it engaging.
Solid work. Well produced and mixed.