Not the best animation, but the humor was there.
I didn't laugh at all, but the jokes were funny.
Fix the trucks sprite so the little line of original backround isn't at the top of it.
Maybe put a narrative voice in, while leaving the text up. Make the voice one of those english rich book reader voices. If you understand what I mean.
Sound effects would be nice, you don't need one for every little bit of action, but some would be nice.
Also, more than one song.
Overall, it was okay, definitly not the worst thing I've ever seen on this site, and you have room for improvement, but you did a good job.