You just applied to a job, but your imagination is too strong, you are able to see some zombies at your workplace. The zombies are imaginary, but you feel like they're real and if they get to you it will look like you are just playing around and your boss will fire you for that. So your task is to keep the (imaginary)zombies that would only move when you're not looking at them away from you by clicking them. WHILE doing your job, because if you don't do your job correctly then boss will also fire you.