This weekend in Philadelphia, gamers got the chance to play a version of the classic video game Tetris on a one-of-a-kind platform: the side of a skyscraper. In celebration of the 30th anniversary of the game, the organizers of Philly Tech Week worked to recreate the geometric-inspired time-killer on the side of the 29-story Cira Center. The 100,000-spuare-foot screen—made from thousands of LED lights—was an effort to break a world record last set by a game of Pong on the side of the same building. A lottery was used to select the lucky few gamers, who won the chance to have an entire city collectively judge their Tetris strategy …