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PHILADELPHIA (AP) — Hundreds of Tetris fans are having a little fun with a big version of the classic video game.

The Philadelphia skyscraper-sized version created a spectacle Saturday that organizers hope inspired onlookers and players to think about the possibilities of technology.

The 29-story Cira Centre, which has hundreds of LED lights embedded in its glass facade, provided a 100,000-square-foot “screen” for the gamers. Images of supersized shapes “fell” on two sides of the tower as competitors used joysticks to maneuver them into place.

The marvel kicked off a citywide series of events called Philly Tech Week. It also celebrates the upcoming 30th anniversary of Tetris, a game loved for its elegance and simplicity.