Your Getting it.. but..
Nice movie, however I might suggest a few things to tweak it up.
1. Change the movie size, so you dont see the sides of white.
2. Use a different font, that is easier to read if you are not going to have voices.
3. Make sure your movie clips, (such as the Arms) are a little more fluent.
Spend a little time polishing the movie to clean up stray lines after you done.. and you have youself a decent plot and movie. Good work, you can do good I am sure of it.