Superb!
This is the type of animation that gives me hope when visiting Newgrounds. You have to be one of the best flash animators that I have ever seen! The big pluses for you are the excellent smoothness and originality of your characters. Most animators that I see simply make a single image and move it around the screen, a far less appealing animation technique than your frame-by-frame redrawing. Other big hits for your work are the good music selections you make, and plot line you establish. Humor always helps, and fortunatly you provide plenty of it. Keep up the great work, and I'm sure many of the thousands of Newgrounds viewers will eagerly wait for your next animation.
p.s. People love hidden things in a flash animation like Easter Eggs, adding one or two of those could keep people coming back and improving your score for several days. I realize asking you to add extra content means a lot of extra work, and would only advise it if the addition doesn't mean you sacrifice the quality of the main content.