Intrigued, Emma decided to give it a try. Alex handed her the makeshift controller, and she began to play. At first, it was awkward, trying to manipulate the Tetriminos (the falling blocks in Tetris) with her hand movements. But as she played more, she discovered the freedom and challenge of playing Tetris in a new way.

The webcam tracked her hand movements with surprising accuracy. She could rotate the blocks, move them left and right, and even drop them quickly by swiping her hand downwards. The more she played, the more she enjoyed the physicality of the game.

It was a typical Tuesday evening when Emma, a college student, stumbled upon an unusual gaming setup in her friend's dorm room. Her friend, Alex, had rigged up a webcam and a projector to create a unique gaming experience. The game? Tetris, but with a twist.