I agree with the 1-hit kill deal, but I don't think the Mongol warrior would be the right chracter for the 1-hit kill. Also, I suggest characters from pop culture, like Leeroy Jenkins or something.
But the thing that all games from this site lack is a true sense of story. Chaos faction is closer to super smash Bros. more than anything else. Why people play games like tactical assasin or thing thing is becasue although they wait for a new engine to come out, they also wait for the next new plot twist. Which is the biggest reason people play/buy games, or movies. Dynasty sterret came close, but not close enough. Chaos faction had none, epsilon a little. So, basically story is what makes games worth playing.
Well, no I take that back. Story Is what makes flash games go above and beyond. So right now you are at the top of the no-story pile of flash games. Admitably, your games are better than some with story, but when a good site makes a flash abomination is when things hit rock bottom.
If you just skipped the above because you were scared that I could write this much, It can be summed In 1 word: STORY!