Love the idea and the general look of them, but I sorta wish you'd gone for a little more individuality instead of just making them all warped and hole-y. Like, put a worm in one of AJ's apples, make them look rotten. Turn Fluttershy's Butterflys into moths or some darker sort of butterfly, make Rarity's gems cracked and sharp-edged with shards all around. Make Dash's a dark storm cloud. Can't spontaneuously come up with something for Pinkie and Twilight though. Obviously this is your idea and your artistic decision, just wanted to give some input :3
Great set, but before zooming in, it actually looked like Twi's had this one lone eye set into it. It's just the background piece showing through, which shows impressive detailing...but it's still creepy, to good effect!