Looks cool, I couldn´t do this in paint (except spriting maybe)
But every artist needs critique (did I spell it right?? Hope so^^)
-The head has no shading at all, you should change it.
-The things on the legs have no shading either.
-I´d change the whole... um... stomache (sry, can´t find a better word for it) between the front legs (it´s too small IMO, and it should be more left)
Like I said, that´s just my oppinion.
Hope you could understand everything XD