First stop motion?
So this is your first stop motion? Okay then!
Well, to start off...
It was pretty simple and fun looking stop motion. I liked the laser effects that came from R.O.B's eyes, but... They just seemed to be some short blinks of light rather than actual laser shots.
The idea was simple, just Wall-E messing with R.O.B until he gets pissed and starts chasing, yeah. Nothing complex. Just simple idea with a simple ending aswell.
Audio track was nothing special either, just existing lines from the Wall-E movie and other sound effects.
Okay... Now to constructive feedback with the animation...
As an ex-animator in claymotion and stop motion, I have to say that you could have taken more frames of movement with your camera, because at times it looked that everything was all jumpy and hasty. It's the usual thing to happen to new comers to stop motion and I can relate to that aswell. If you take a lot more frames, the video can be put in to a simple video editing program so you can adjust the frames per second rate look nice and overall result is a lot better.
In overall, this is simple, nothing new, but pretty good looking first try at stop motion.
Just try harder next time you do a stop motion, ok?