hmm... i see sooooo much i would change
ill start from the top and work my way down
first off instead of having some kind of strip affect around the the blue difference clouds, you could have an image of torn paper, like
this one, and cut out the white part, then set te rest to multiply.
fill a layer behind the torn paper with black, so that it only shows through the empty part of the paper
put your face layer on top of that, and add a layer mask, then paint away the edges with a large soft-edge brush, so it just fades to black
set the fire around the word "devil" to screen
set the star to multiply
quick select the eye on the face layer, then add a layer mask to the blue flames, or just resize the flames so that the stay withtin the eye
lose the hands, it is actually not that easy to get them perfectly cut out, and even harder to make them fit in
set the wings to 100% opacity
set the light rays around the word "angels" to screen
change the color of the blue font
if you give me the psd, im sure i could come up with more, and actually show you