Admittedly this was bit more of an ex tempore, "blow some artistic steam" image, but I'd be happy to get critique on this, since everything is still in a workable stage.
(To those not familiar, the characters are Marvel's Basilisk and The Lizard, with some artistic liberties: https://www.dropbox.com/s/41q4ud3p0ujtph3/lizards.jpg )
Well, IMO you have a nice, dynamic composition with expressive characters. Now, why don't you go further by working on masses and volume to make disappear the "scribbling"?
Another point is that I feel the "bright" area behind the lezard is too bright without any justification. maybe toning down this area could be beneficial.
What I think is most disrupting are the two tangents almost in the centre of the piece: The head of the lizard against the basilisk hind leg and the basilisk head against the lizard's tail. Apart from that, the composition is quite dynamic.
気計 - Quike "Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the present.."