YOU WANT SUGGESTIONS???
I'LL GIVE YOU A SUGGESTION:
1- Put some music in it. (A nice tune like the first level from super Mario Bros 1)
2- Make the boss more life-like. Your main character looks good so how hard could it be?
3-Same goes with enemies. (they look like they are running around in there underpants)
4- Don't let the main character slip so much. So he can fall over and over again in those pits. (GODAMN)
5- One word: MEGAMAN.
That's all I think I gave it a onest review, time for a beer. Or blam anather Flash. (HAHAHA!)