I really don't see how straightening this will do much for this picture one way or another. In fact I think the tilt adds to it a bit. It makes it look like you're on the climb, and once you hit the turn ahead everything is going to be downhill again.
My biggest impression is one of claustrophobia. You don't get a lot of the outside to give you a feel of space - mostly because all you can see through the windows is other buildings. It also doesn't help that your viewpoint looks to be so close to the ceiling. I wonder what it would look like if you'd taken the picture while kneeling?