A good start.
Upon reading "first submission" i assumed i would be greeted with a stick figure animation at like 8fps containing around 70 frames. This submission was a pleasant surprise. The graphics are above par and the animation isn't the worst. It (animation) could be smoother but that will come in time. You had what appeared to be somewhat of a plot. You do need a preloader [consult some of the flash tutorials on the collections page] because some would be viewers may not wait to watch the submission thinking there is a problem with it. The play button and the sound was icing on the cake. Good luck with future submissions.
~Dna