Well, it's unique, that's for sure.
It's got a plot to it. But the graphics were way too choppy at parts. I'm gonna guess you did frame-by-frame animation at a low framerate. So, I suggest that you try tweening next time, and increase the framerate. The other things you have going on in this animation were a bit screwed over by the choppy movement.
But... the sound was very nice.
I'd say that this was a decent animation, and a good first try. Make your animations smoother and you could have a nice Flash.