Cool oekaki, SydneeXxX.
![Smile :)](./images/smilies/icon_e_smile.gif)
I really like the fact that you used multiple shades of blue in the sky... a lot of people forget the varying shades in nature. =)
As for critique, I might suggest that you use harder lines? When I started the oekaki I also did everything with the airbrush... 'tis very natural to be afraid of harder features.
![Wink ;)](./images/smilies/icon_e_wink.gif)
You could lay a base with the pencil tool and use the pen/pencil tools to add fine lines for detail. Then you could use the airbrush at the very end to add the necessary glow. =3
Just a friendly suggestion of course, you don't have to take it if you don't want to. You've already got off to a great start on the oekaki. ^^