First off, you've done an impressive self-analysis for a first attempt, your bullet-points are all spot on
jpegs #34 and 39 are very good in terms of lighting multiple rooms within the view point, and lighting around objects that throw shadows
Ya, as commented, get those verticals vertical! better yet, why don't you play around with the manual lens corrections in lightroom. you can do wonders to correct what your setup failed to achieve. Try fiddling with the vertical and horizontal sliders.
Lastly, composition. Look, I know you want to show as much of the room as possible. We all do. But take a look at your interior shots. Every one, you've got your butt jammed up against the corner of the room, shooting to take in as much as possible. More information is better, right?
NOT! Start throwing away volume and concentrate on quality - show just the very best each room has to offer.
Not to mention, a series of photos, all taken from the corner of the room, are immediately obvious and worse, boring. Mix it up. You'll never square up your shots until you come out into the center and shoot 90 degrees out instead of 180. Or, why don't pros just use a fisheye all the time? That's what you're trying to do by shooting in the corner - pick a view and settle for less...more often than not, it ends up being more.
Lastly, go here http://scotthargisphoto.com/blog/
and get either his e-book or his video series. That's all you need to launch.