You should really download Illustrator and start doing vectors in that. Because while your vectors are well done, you're obviously lacking the right materials that Illustrator provides, and you aren't using the right techniques to do your vectors. I'll send it to you if you beg. :D
Anyway, you did do a nice job on it, I like how you chose red, white, black and grey as your only colors throughout the entire wallpaper. The wallpaper seems too one-sided still because everything is on the right side, you should move it over to the left more to center it all out and then everything will be balanced. You kow what I'm going to say about that moon too, haha, SOME textures would've been nice, but its your choice.
The wallpaper is overall a nice piece of work, good job.
