Alright, I'll cut it down for you:
Notice the bottom part of the arm, the top part connects, the lower trails off for some reason.
I never saw blood form THAT much of a shadow, nor it really coming out like that, try more of a "spray" effect.
The blood here doesn't match the blood in the "shadow", this bood is much more spread out compared to the other one, and I doubt all that blood would be coming out of the front anyway. And look at the top of the gun, come on man, that's grey blood! If you're going to be somewhat simple about making this, at least make the colors match up.
It's a cool concept I guess, but you just really need to work on putting it together