Good game, too bad it's been too much of this kind
There has already been a series of this kind of game, similar design, similar content, similar gameplay - minus a first person shooting game the other series has. Except that series was made like 3 or 4 years ago, perhaps even earlier because i remember that was when Flash was just out. Unfortunately I don't think I can find those games now, used to have 'em on my harddisk, but that was long time ago, i've probably formatted 'em out.
For the game itself, not a bad one, but the author may wanna consider add more combo the character is able to do instead of just hitting shift z x and direction keys.
Overall, good game but too old design.