Decent.
This is a good enough flash to survive on Newgrounds. It's animated pretty smoothly, the sounds aren't bad, no awful microphone work or anything. It's a bit trite/predictable, but not too bad. The movement of the sprites once the flash started, though, was much too fast, in my opinion. Try moving that down a bit.
And...that's a strange version of the Mario theme in the intro to the movie. Definitely not the game version. Interesting.
3/5, good, could use a touch of work. Good luck.