Meh...
Nothing too great. The main problems were that you drew too many of the SFX yourself, and that all the sprites were in .jpg or .jpeg format. Tips:
Never draw SFX yourself. Stick to sprites.
Always have sprites in a .png format. They look best that way.
Practice animations before you really use them. Keep adding more detail to animations until it looks something like SMBZ. Then submit it.
I don't have Flash, but I have used it and I am a pro animator.