well,you all right,when i'll come back from school i'll take it off :]]
I don't think the criteria for the challenge is to make it realistic. Besides, how realistic are zombies in the first place?
aw...no keep the heart bubble,it looks cute..it could always be a sticker or something stuck on afterwards :)
Instead of the heart baloon maybe a lipstick mark as if she was sending the picture to her pretender.
Loose the heart thing. That would never be in a photo.
and about the shading...that it doesn't come from the moon etc. it's because the flash of the camera.