Unconfident voice acting
Your voice is not good for voicing movies. You should really work on your voice to record it on microphone and then use in flash. It's not THAT simple actually.
And about your frame by frame work. The parodies are funny, but drawings have to be more detailed, and you have to draw more character movement in every frame. While in your movie the same pose of a character repeats for quite a long time. It got to always move. And also the drawings are way too simple. You must add lots of detail to characters and even to the background. If remembering every detail for a character poses a problem, you can always use a piece of paper to write it down. Personally, I remember every single detail on the character and don't waste paper.
2/5. Put more effort and don't submit poorly done projects to newgrounds.