I'm a big fan of the stepping stones programming puzzle due to its simple rules, as posted on Al Zimmerman's contests: <a href="http://azspcs.com/Contest/SteppingStones" rel="nofollow">http://azspcs.com/Contest/SteppingStones</a><p>So I made it into a little web game available here: <a href="http://steppinston.es/" rel="nofollow">http://steppinston.es/</a><p>Made with PIXI.js, should be playable both on desktop and mobile. Please let me know what you think!