Umm...
I'm sorry, I'm sure this is a meant to test your Flash skills as this is is your first animation, but there's just not a lot going on here. The art was OK, but the animation was really choppy. Try adding some extra frames in there to make it more natural. The sound effects were also off.
I'm fairly new to Flash as well and have yet to upload anything, so I'm not being to harsh on you. Just try to work harder at it.