Not bad! Good personality, good loop. Just work on cleaning up your keyframes first before going to your in-betweens. I've noticed the shoulder socket of the left arm actually moves up toward his head. Also, Vault Boy seems to be looking diagonally, while his arm is motioned to move to just the side. This would be a great opportunity to practice your foreshadowing, and have the hand come a little closer to the screen :D

Try harder. Almost there.