My first WallPaper!! :D:D You like?

LIKED?

 

Wallpaper for what? Usually, unless you're designing a wallpaper for a phone, it's wider than it is tall. 1064x768, 1920x1080, anything with a 16:9 display ratio basically

As for the image, you should work on putting in more effects than smudge. You should give thought to lighting, depth, and color. Also, the text is awful; don't add text unless you know how. It sounds blunt, but the thing about text is it can easily break an image, but it can never MAKE an image unless the theme is typography. It's best just left out.

 

Yeah if you insist on using text, less is generally more. It would be nice if the render blended with the background a bit more and, as Mohtasa said, if lighting was used. Try burning the edges and sharpening the focal, etc.