Death.
There's An App For That.

When James’ roommate vanishes, he begins to investigate.
After finding his friend’s phone, frozen, locked in a mysterious game loop, James elicits the help of fellow students to uncover the mystery.
They soon discover that this is no regular game.
What they find is more than a game. Much more
Whatever you do, don't click ‘download now’, or you’ll be next.

Cover Created By, R.L Weeks. https://www.facebook.com/creativecoversandauthorservices/?pnref=lhc