The arcade classic. Try to turn all the lights off during each round by pressing the correct combination.
Press a light to switch it. This also switches all adjacent lights. Try to turn all the lights on each level off within the time limit! Hint: You only have to press each light once! Good luck!
A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.