The contrast seems really light. Keep that in mind next time around. Also I would suggest using references while creating pixelart. It feels like an airplane, but real planes have those hatches on the wings, and grooves, and things like that.
It certainly is cute, though :3 And also it's a pretty creative interpretation of the challenge. Keep it up, and perhaps take your work to the wip section of the forum, to get comments and critique for the next time you want to participate in a weekly challenge.
On another note, if you want to improve, I would suggest reading this- http://www.pixeljoint.com/forum/forum_posts.asp?TID=11299
Welcome to pixeljoint! I hope you enjoy your time, here!
I like this! : D You could improve the glass reflections and the clouds.