Scary stories, the paranormal and short horror and fiction.
Slender: The Arrival
Pumpkin Remover, from The Game Homepage (Creators of Red Remover)
I'd say it's 'wildly addictive', but lets face it, every flash game or app is. Some of the later levels become quite challenging, you will need to use timing as well as puzzle solving skills. The app can be purchased here:
The flash game can be found here: