I would b pretty creeped out D: I was thinking about many many creepy sounds too.
I'd make it have a little girl wandering in the forest sometimes and you'll see outlines of slender behind trees when you collect 3 pages o3o
I stink at horror stuff too xD Since im not a big fan of it
Hehe, My sister played one on the iPod: Slenderman and the lost chronicles and then slenderman appeared out of nowhere right infront of her. It was funny
LOL, I'd grab a gun (out of nowhere) and kill him senseless. Poke him and kick him xD Thats how much I reaaallly hate slender. Never played the game though.