I think this would be a great minigame to work on, code-wise we can make it like zombies, where a player is randomly selected to be Slenderman, and he is then spawned away from the players and the players must find all hidden blocks before being caught by Slender. The player must be on full fog and coloured black, unfortunately we must use CPE players only and request that Dzienny adds a thing called Envcolorset I think it's called. That is to make it hard for the players to see of course, the players win if they collect all pages (obviously a block, like snow block) and break them, while slender man can kill players by touching them, and maybe teleport near players when they have broken like 3 pages.
What do you think? Intrested? I'll work on my own basic version that is very featureless, but it would be cool if people could help, especially Dzienny Maybe he can make a Slender bot with AI.
Look at this: