Not bad at all
You say you're 13, right. Well, for something made by a 13-year old, this isn't half bad. Sure, it's not perfect, but it's much better than the standard issue stick movies that were made in less than the time needed to read the newspaper's front page.
The only thing that could use some improvement is the sound. The music is kewl, but it doen't really interact with the events. Also, though you did made voices, some sound effects would be nice.
Anyway, keep it up!