The head seems a bit too large for the body.

great job author.. awesome for Halloween

nice work!

Good thinking..

I feel that the perspective of the mask doesn't match the perspective of the face. Just a small detail, but it happens to everyone

author, if you were going for a cut and paste look you may want to add a gentle drop shadow below each section to give it more of that type of look (simple Trompe-l'Å“il) also cropping the images perfectly square (90 degree) to give a bit of consistency would make it more balanced IMHO, nice idea and good luck (Photoshop contests seem to demand a bit more work for higher scores, but I commend you for your effort)

I'm lazy D;

LOL