Using your keyboard or gamepad you'll have to help Nekomew reach the bathroom before he pisses on himself. To do so, you'll go forward along the corridor as you'll escape from the scary monsters that are waiting for him. You'll be able to avoid those creepy guys by paying attention to the music and:
Closing your eyes: close them if something freaks you out.
Covering your ears: that way you won't listen things that could make you want to pee...
Blinding them with the doll's light: let's you light the corridor and stop monsters that want to jump on you.