AD to turn the light particles. Mouse to move character. There are two modes to how the light is displayed, one shows where the lights hits and the other shows the beams. Stop game with W key. Change background with space.
Not much, just think this is cool. I have always wanted to mess with light in an Engine. VERY LAGGY https://turbowarp.org/750045754 - go to this link if it is too laggy for an alternative, thanks you @awsomeness_300