You have a lot going on here.
I see that you're trying to make the splatters of blood, which is good.
The blurry flowery thing and the blob next to it really don't fit. Same with the light brown thing above the little
pictures. It's too sharp and pixelated. I would totally take out the little pictures.
That said, you really need something happening in the wall. I like the little girl. She is a little blurry, so you may
want to sharpen her a little. More blood splatters, especially behind her, and more shades of red and brown. In the bg,
you could try using some photos of warfare, and blend them together and filter them to look more painted, maybe
transform them to be all one color of brown or dark red. The overall feel of the wallpaper needs to be darker to go with
the little girl tearing a stuffed rabbit limb from limb with her teeth.
It's totally okay to submit a wallpaper that is not from an anime but has anime style artwork. You have a good idea
here, and I like the concept of commemorating the lives lost in pointless wars. Keep working on this, because I'd
like to see it in the gallery.