His leg ends too suddenly, looks like it was cut off. Look at my current and see how it blends in gradually? It should resemble that (though since yours is behind something solid, it should be less gradual than mine).
Is that your first sprite? I've never done a sprite, but the lighting and coloring look excellent from my point of view, it also flows extremely well, but it's kind of wierd how the fire effect goes through his legs. Great depth too. 6.4/7