Space to use flashlight. Shadow will make his way to the vents, hold your light on him to make him go back. Sid will make his way to you, when he is under the shock button, shock 'em! On the camera, hold down click on the order buttons to check them off, some will take longer than others! Rut's power will charge up, put it down or he will activate!
Also, you whenever you start, you might want to click the flag a few times for it to work correctly.