Google’s annual I/O developer conference takes place in the Moscone Centre in San Francisco this June and, to promote the event before registrations open in two weeks, they have released an HTML5-based game – another addition to the fantastic list of Chrome Experiments. The input/output game involves designing contraptions to get a ball from one side of the screen to the other in true Rube Goldberg style. Google will also feature some of the best creations at the conference from June 27-29, so grab it from the Chrome Web Store and get building!