I published my Work-in-Progress maze game in Google Play: https://play.google.com/store/apps/details?id=com.tinjas

After a minute or two (after tapping Start), it will jump-scare you with your friend's photo. You can then jump-scare your friends with your own photo.

It uses Facebook, but doesn't post anything (other than Game Request, which is user-initiated).

The game itself is still largely unfinished, but playable. Feedbacks welcome!