I checked out your video and a couple things stood out to me:
I liked the room tones, and the slow builds. The computer sounds and typing were appropriate. You supported the change in on-screen energy between the computer room and the traffic/tunnels. Also, when he's driving in traffic and we hear the whooshes, engine sound etc - that worked very well for me.
As for the "bad stuff", In some of your clips I heard clicking at the beginning and end of the clips. You'll want to fade in/out or xfade for a fraction of a second to get rid of that. Also, and this is a design issue and I have more experience as an editor and mixer, but I think you may want to consider altering some of the aircraft sounds a little by pitching them or mixing in other similar sounds so they don't sound so much like aircraft.
I'm hesitant to go into detail about anything regarding design theory because of my lack of knowledge so I guess that's all I have to offer.