Please use the 'edit it' under the art to upload a 1X version and then hit the resubmit, thx.

While the concept is good I think that the overall quality is lacking.

I think that the colors that you use in the foreground should differ from the ones in the backround. The foreground colors should be brighter to makes things "pop" and to differentiate from the backround. Whereas the backround should have less saturated colors, showing that the character can walk pass the objects (rocks, trees).

Lastly, I think that using a gradient-esque technique on the rocks is a bad idea. I would also suggest bringing the scene down to x1 size.

Here's three tutorials if you ever get stuck with colors or anything of that sort:

http://www.pixeljoint.com/forum/forum_posts.asp?TID=10695

http://www.pixeljoint.com/forum/forum_posts.asp?TID=5692

http://www.pixeljoint.com/forum/forum_posts.asp?TID=11299

Good luck!