Your vector could be a lot better. Soul's ear looks like a box, is missing some inner detail, and some of your color shapes can be seen outside some lines, or not filling in the space completely. The lineart in general seems a little lazily done, and a little boxy looking as well.

I'm also confused as to why you have the moon in the sky, when it's clearly daytime or middle of the day. o_O

Aspects of the background are a little blurry, and I think if you added more shades to your clouds, they'd could look fluffier and less flat looking.

Loooool whats going on
hehehhe nice creativity i really love it!!
you should have changed the hair as well XD!! i thought it was an E7 wallpaper hahahaha
just one thing, the eyes of the girl could have been better XD
but i really love the concept its very funny and creative!!
Good work! +fav!

The perspective of the wallpaper is really very good. In my opinion the vector of the clouds is good, with just the right amount of fuzziness and smudging. There are a few mistakes in the vector, and I would have used fill lines rather than stroke lines. I also think the moon/planet is a nice touch, but could be blended into the rest of the vector-styled image a little better. Overall you did a good job of brightening and improving the quality of the original image (which was a raw scan and a bit pixelated) and making it cleaner.

Don't let criticism bother you, nobody's prefect. Just use it to your advantage. ;)
Keep up the vector practice, and I look forward to seeing your next wallpaper.
Good work.

The vectoring and painting job really could use more work and detail/depth but the interesting perspective and a fitting atmosphere make up for that. Overall, it's a nice wall. :)

Wow eureka+soul eater
nice idea
i like how you did the bg it's really pretty
but i'm not sure if the moon looking thing fits