Not bad.
For your first flash, it was pretty good, actually. There are still stuff you should improve, though. You should add a preloader in the beginning of the movie, you can find tutorials here on Newgrounds. Also, the sound quality would've been better. And for last, the video itself is kinda blurry, so you must be doing something a bit differently. But overall, it was good for your first flash though. Keep it up!