Nice Job :-)
i was quite pleased as i watched your submission. the most sprite movies except the more populare ones like SMBz or MK vs. SF, have problems to show the sprites in fluid and consistent animation and movement behavior. you really made a very consistent looking and fluid flash movie.
one thing which bothered me a bit was the way you showed the slow-motion-bullet-time-like effect with this negative color circle affecting ryu and the background, i thought it has to be more emphasized and more catching for the eyes, a more dramatic effect performance. maybe you make it more faster expanding and in someway flashing, cause it just gave a to inconspicuous feeling. in example if i try to recall the scene its really blurry and hard to reconstruct where it begins and how i noticed the effect in my cognition.
thats a bit pity ;-)
beside of this i don't see any real flaws just space where you might improve and surpass yourself artistically and in performance.