Every year at about this time, Google does a cryptic teaser to announce the dates for its I/O developer conference, usually happening in the late spring. Last year, Till Kottmann, one of the developers behind the popular Lawnchair Launcher, cracked the puzzle in record time by circumventing it entirely. This year Google is tweaking the formula a bit, turning the teaser into a forced collaborative effort inside a highly technical puzzle/game.

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