Decent design overall, but not feeling how you applied the blur or your light sourcing. Your background is crisp and the render is blurred so I am drawn to the background.
There is also way too much white around the render. Top left of the head is goo positioning, but way over done. Lower the opacity or move the light source more out of the canvas. Make sure you put it in front of your render as well, not behind. Then remove the white on the top right of her and next to the gun.