clothing line

Hello, I need to someone to maybe make this shirt design look better. I also needed someone that could add demons that are dead on the white part or whatever you think looks good. I just need it too look very nice and scary.
I am going to attach the psd files for both the front and back of the shirt.
The front says Warning: Don't look at the back of my shirt with some blood stains. Feel free to be creative and change it or you can leave it.