I would work on keeping still objects in frame from not moving, even a little bit. It's clear that you redrew the parts in for a couple frames. (I'm terrible at describing what you're doing wrong) but yeah just try to maintain frame consistency. You also might want to work on voice acting, which wasn't convincing. You can find plenty of voice actors and actresses on newgrounds. Also be sure you add in sound effects. They're imperative for almost all animations.
All in all it's clear you show promise as an animator. You just need some practice.