The animation is really good, I like it. I know some people end up drawing like all the tweens and everything within the animation process when they are creating a piece for animation, but the only tweens I would see that you would've had to draw was with the mouth. But never the less it is a fantastic job that you did, I know when I did 2D animations I drew out all the tweens but yeah thats just me but others do it differently. But the style I like too, its a good style. Like I said Good Job!