I like both of those ideas, but the slenderman game sounds pretty darn cool... As long as it executed properly... A remake of slenderman would be good, especially if the "collecting certain objects" part changes. I support the making of the second idea into a game (and then later on make another one on the first idea?). Idk, but the slenderman game seems promising.
Thank you for the feedback! Like I said, I just want to do something different with the character of Slendy. I also want to do something different with his proxies. I have most of the character sprites done already, and I plan to have a lil 4th wall break or two in the game lol. I appreciate you reading through my ideas and giving your opinions :)