Well, I haven't made a stop action in many years, but even as a younger kid I think all of mine turned out slightly better. I don't quite like the camera angle or distance at all. I'd get it much closer so you can see more details and and get a flatter angle. It was pretty choppy, so I'd recommend to keep practicing on your skills and a stop actioner.
The best advice that I can give to you is not to just go ahead and make a small fight scene. It's great for practice, but put some detail into it. You don't even need a plot, but this short of a film just won't do to anyone.
Slow down a bit and for god sakes keep yourself out of the shot! I can can't just as many shots of somebody in the picture as I can count them out of it. There's a time when you move the entire desk thing that the robots are on as well.
The biggest and by far easiest thing that you could do to improve on this though is to add sound. It really is the easiest thing you could do and would have improved even this choppy little short ten fold. Background music, voices, and sound effects are essential when making a stop motion.