Sigh.......
How long did it take you to make this? 2 weeks? You might wanna put more effort into the quality of the animation, instead of trying to finish it as soon as possible. Also, try doing the drawings on your own, don't just copy them from others and change which character it is supposed to be. As someone else mentioned, in the scenes that weren't copied the proportions are off. Try doing some of this and you will probably get a lot better at drawing.