I am a monster coming from your deepest fear to eat you. I am starting walking 4000 steps a day, never stopping, inexorably and faster everyday. You can walk away from me as long as you want, I will never stop.
What happens when I catch you?
Well, I eat you and thats the end of the game for you. You have only one chance!
Pretty simple uh? Lets see how long you survive.
Oh and by the way, the only way to escape me is to have a pedometer, which means iPhone 5S or newer.