Clap Clap

You see a newspaper ad about a house-sitting job. Since you're short on money, you decide to sign up. Did I mention that the house you'll be staying at has the latest home automation systems of the 80s!? Now you know! Simply clap twice in any room in the house to toggle the lights on/off. We sure are lucky that there are no entities around that can take advantage of this. Immerse yourself in the environment with amnesia-like physical interactions, volumetric audio and PS1 style graphics. I suggest you don't go snooping around too much, it's for your own good.