Hmmmm...not bad...
Not bad...it seems a little stiff in the character design, though. I would suggest doing it over again for three reasons. First, the animation, as I said while clean-cut, is kinda sticky. It has unrealistic posture for some of the scenes for the characters. Secondly it looked very flat, like you really didn't take enough time on it. If that be the case, go back and do it over so you can take your time with it. It's your flash, make it as appealing to the eye as possible. And thirdly, the voice acting....you need to find somebody with a deep masculine voice to do Batman and you really need to sound crazier and more emotional when you're playing the red hood/Joker. No offense, but the voices sounded like they were being done by a high-school lazy-boy. You know, tired. With your voice I think you would make a pretty good Joker, but you have to really push some credibility into the character's emotions. If nothing else, just fix the voice-acting, kay? Once you get that down, you're all set. Thsi flash has a lot of potential, just take it back and improve on it. ^...^