Five Nights at Freddy's is a simple horror game where you take up night shifts as a security guard for Freddy's resturant, strange and frightening things being to happen when the animatronics seem to develop a mind of their own after 12AM. You have a limited amount of power and thus, very limited visibility while you struggle to decide if you want to keep the cameras/lights on or the doors kept sealed.
Mouse – Navigate
Left Mouse Button – Interact
Use night one to familiarize yourself with the game’s layout and mechanics
Springtrap is drawn to noise
If your feed goes wonky, it means Springtrap is moving to a new room
Machines never move while they're being watched, so the security cameras only ever show them glaring vacantly, motionless in the shadows.
Don't check the cameras too often, though, or the power will run out, spelling almost certain death.