A game where the controller is your burning cigarette
The smoke from burning cigarettes discourage mosquitos and with the burning end of the cigarette we can burn them if they are too angry. All of this happens virtually of course only on the screen.
One type of infrared light is not visible to the naked eye, but most inexpensive cameras (phone camera, webcam) can see it clearly. With an appropriate filter the infrared light source can be tracked, and can be used as pointer.