I survived my first (very boring) internship ever by playing http://canvasrider.com, this is now rebranded to Free Rider. It's a super addictive game where you race a bike on tracks drawn by other players. Thousands of tracks! And now they even have a Chrome Extension, oh my lord.
@bramk Thanks for the kind words! Canvas Rider was actually an unauthorized clone of Free Rider, the original Flash game that we released in 2008. We have big plans for the future of the franchise.
Idea Stash
Remember This Game?
Trumpoji
Remember This Game?
Bablic