Good for an initial effort
Your choice of sound and background music were more than apt, but it is the graphics, and the voicing to a lesser degree, that you should work on.
1) If you want to make a really good Flash movie, go back to the classics. Read a screenplay or look at storyboards for a movie. Cinematogrophy is very important for setting up the perfect "shot" in anything visual, from a play to a Flash movie.
2) The influences of a movie like the Matrix are obvious, but it pays not to follow the pack and do so. The Matrix is mostly just paying tribute to older action and kungfu movies, and having an original style is what pays in the end.
3) Recruit multiple voice actors, and try to sketch out your shots before you make them in Flash MX.
4) Have fun!