Not bad dude
Here is what i think you need to do for your next one. First of all, you just need to put in more action into the fighting. The fighting seemed to predictable and simple. Make things a little more interesting. Secondly, I think you should make the flash longer. I like watching long sprite fights, like alvin-earthworm did with super mario bro Z. Finally, I personally like it, when there are more than 2 people involved in a fight, whether it be 2 or more teams fighting each other or some kind of free for all.
Good job though! Hope to see some good stuff in the future.