Some things that immediately come to mind on the airplane one:
-where are the missiles coming from? is it dodging them, or did it fire them?
-If the former, where's the indication that he's dodging?
-That background's kind of dull-looking, not a lot of visual interest, but I'm also assuming it's just a sketch layer for now while you clear up the plane.
Things I might have done if it were my work:
-Flip the background upside-down so it looks like the plane's mid-flip to create something neater to look at
-if it's supposed to be firing them, add some brackets under the wings and align the missiles and smoke better so they're coming from under the wings more clearly
-possibly add some kind of background fighting, like gun turrets, tanks, etc to get it looking bullet-hellish like air combat usually is