Good work on your first submission. I think you did well on the vector and the abstract design in the background. I especially liked the funky bright colors in this wallpaper. Nice job with the textwork too. It actually looks great as a background. I've noticed that there are some random faint blotches of light in the wallpaper though. I think it looks better without it. There's also a little piece of red line in the background which should be removed. It's rather small but still noticeable. (It's somewhere above that rounded shape thing in the background). Hope you know which part i mean. ^^
Nice work nonetheless. =)