It's really not bad at all -- I may not be a fan of the drawing style (me thinks it ought to be smoother). But you have amazing colours! There may not be much indication of movement apart from the guy in falling stance... but the colours are bright, they scream DANGER. I like that.
Possibly smoother lines? Or try hand-draw this, since most of us have more control over a pencil than a mouse. It'll be nice to see what you come up with.