WOW.
I see your into anime. You will come far in Newgrounds.
For a first flash it was excellent. For future movies, you should consider:
Sound
Colour (Unless you intend on a style of B&W)
A Better story line (Plot)
Graphics were pretty good, and so was animation.
all I can say on that part is you will in time move up to higher frame rates, making your flash smoother.
Overall I give this a 10/10. Especially for a first flash. Great job.