Switch off every light in a 5 by 5 logic puzzle. Each press flips itself and its four neighbors. Increasing solvable challenges, keyboard and pointer controls, undo, hints and saved progress. Source: https://github.com/sepandhaghighi/lightsout (MIT).

Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.