Funny, but needs improvement.
I thought the story was funny, some of the animations were well done though not all. The cutting and timing of scenes was great, good job on that part.
One of the biggest flaws is sound-wise. Some of the sounds (Like with the wall-fortification) were very low quality and too "sound box". The music was great, and the one at the beginning fit the animation, but the rest of the movie was too quiet. Even a very silent background music can help and so can other sounds (edited to sound better).
Graphically, try to improve the drawings. Maybe use the line tool or add colors. Register hair with he head so you won't have to redraw it everytime.