Hm...
Not bad for a first tutorial, but some advice. I'll leave out the stuff you mentioned in comments.
First, please oh please use fills in your buttons. Even if the fill has a 0 alpha or some other such, you can still highlight it. Instead, you have to click those blasted outlines, and that's a pain.
Otherwise, here's my standard advice for these movies.
NEVER use high quality sound to cram up the size. This thing's barely 10 frames, there's almost no way it should be more than a megabyte. Compress the sound through whatever means necesary, or remove it entirely.