the clouds are terrible... and i think you would do better using pretty much any other dark color than black for that burned coat of his... but apart from that, i think its pretty good for a cellshade!
I agree for the most part about the clouds, but Shaddy's still fairly new at making backgrounds, so it's expected. I'm sure with more practice, and experience, he'll start to get the hang of making/adding extra things like clouds.
@Shaddy: You did a fairly good job with this, just keep on trying to do new things, and practice them until you get the hang of it. For a long time, you wouldn't even attempt to make a background, so it's nice to see you try to step it up a bit.