Oh by the way, you have a flashlight.Tutorial.
Flashlight is a main mechanic of the 123 Slaughter Me Street series.
In 123 Slaughter Me Street, the flashlight helps the player progress through the apartment. It helps by stunning the puppets and must be shone at the hidden relics to collect them. Sometimes the flashlight doesn't stay on, and the player must keep the flashlight on in the stairs to avoid getting killed by the Follower before the floor is complete.
In 123 Slaughter Me Street 2, the flashlight is extremely useful in the darkened areas as well as to find the hide zone and safe zone. Unlike in the first game, the flashlight seems to be unbroken and works perfectly. Also it can stun The Screamer while others are immune.
In 123 Slaughter Me Street Retro the flashlight is used to ward off the puppets by shining it at at them and to fight the Retro Nightmare.