Looks really nice at this point.
The composition really works well IMHO, though it might be worth exploring if it could be a good idea to have the right wing overlap some of the city below. Right now there is a slight chance that the scale is less readable since the plane and the city occupy separate spaces so to speak. An overlap might prevent that.
And I guess the city as such needs some subtle distance haze, to further accentuate how far away it is compared to the flying kid.
Very good and admirably clean work here!