The effect itself is nice, and the controls/gameplay look great. I'd make sure to add more red into the effect though, and try to let the smoke appear a little later, after the flame has burned. (or above the flame only). Atm, Smoke and Fire overlay and those parts look so grey-muddish, not bright-fireish. Do you know what I mean?

The fire effect on the opponents/other objects needs much more red as well http://www.intuitor.com/moviephysics/flame.JPG, and some black smoke would look cool here.