Nostalgia hit differently with this one - solid game friend!
I've played tons of Slender Man games - the original, the underrated sequel and many fan-made/reboots. I've been always fascinated by the unique approach to horror and this one does it - camera+tank controls. Somehow, this felt creepier than the original. I especially loved the environment and the atmosphere.
I would suggest a little backstory for the main character - She uses her camera, so maybe she is a journalist or a paranormal investigator hunting creepy anomalies. The story for this and much longer gameplay would be awesome.
Best of luck!