First off, the art is freaking amazing! The animations are nice and fluid, too! However, i think that that the time between you pressing the mouse and the player attacking is too long for a game like this. Id recommend shortening the animation do that the response time is shorter. I also feel like you should add a background, like a casino or something, since the place youre fighting in just kinda feels empty. Besides that, Great job on this game! :D