The game itself is ok. No flaws in my opinion. Graphics are ok, music ok, gameplay ok.
What can be changed or improved in my opinion:
1. a more non-childish theme. the characters are really chibi mode or worse. The red characters is similar to a Japanese Daruma doll... Most games are like that now and not sayng it's bad, but really, I would have preferred more realistic-looking characters with real heads, necks and weapons. Really looks like something a 4-8 year-old kid would like. And when I was that age, I wouldn't even care to watch cartoons that look like that. I'd think that they were for girls or even younger children, and switch to stuff like ninja turtles and robocop and transformers. You know what I'm sayin? But maybe it's just me and some people like me and maybe the newer generation of people like this kind of stuff and design. If that is so, even then, this kind of theme would be suitable for non-violent games such as puzzle, adventure... but this game is clearly a Battle game and I was expecting something cool, and it turned out to be childish stuff... at least to me.
2. while gameplay is ok, there's not much to it. It's just clicking and clicking. If you are catching onto the point-and-click trend, well you've succeded, but to me it just feels meh.
But once again, the above points are just my opinions and feelings. That aside, you've made a solid game. I don't mind the ads at all, as I understand the hardship of flash game developers.