Not sure I can add anything useful to this since you scored pretty well in this challenge. Composition is good, the subject is interesting. You received a lot of positive feedback so you must be quite satisfied with the result overall.
My only very tiny nitpick is there is some haloing around the balloons and the basket, obviously as a result of the selections you made. But this is only a small nit pick.
This was my favorite of the challenge. I gave it a 10. There were others that were beautiful and moving, but this gave me a great smile. I love how serious she looks, and that old flying helmet and goggles are hilarious.
THis is my fave so far, love it, especially the girls skin tones, and the dark green balloon, has a nice texture to it.I think this will get a ribbon for sure. 10