Try to escape from numerous levels each more special and terrifying than the other:

Level 0: "Tutorial Level":
Everything is yellow, everything is calm, no one knows where the exit is but him. Better not meet him.

Level 1: "Habitable Zone"
Maybe less hard than the first one because this one doesn't like the light. But beware ! I didn't say it would be easy.

Level 2: "Pipe Dreams"
You're not comfortable in such a tight place and there are pipes, there are a lot of doors but we don't know where to go.

Level 3: "Electrical Station"
Probably one of the most dangerous and hardest levels. it won't be so hard for him to find you

Level 4: "Abandoned Office"
a safe place but not totally and you need a little luck

Level 5: "Terror Hotel"
This is not a normal hotel. this is the most terrifying hotel you have ever seen. there have never been so many entities in a single level

Level 6: "Lights Out"
Everything is calm, everything is dark, you hardly see anything but they see you

Level 7: "The Suburbs"
One of the worst neighborhoods in the world and one of the most dangerous

More levels coming soon !!!