Hey! I would like to say that I like this work a lot and I thought that this was very cute and funny. The facial expressions were great and the animations were good also.
The things that I would say can be improved on are Proportions on the bodies, as well as the lines of the characters can be a little sharper and crisp to make it look more smoother. On the part where the Slender man throws the girl, I felt that it was a bit fast when the girl was picked up and thrown (Mostly on the pick up) but it was still smooth on the throw.
All in all I liked it a lot and I thank you ^^ Keep up the good work and always do what you love!