In the spring of 2014, the digital world fell silent, interrupted only by the swiping of fingers across trackpads and touchscreens. The culprit was 2048 , a deceptively simple sliding block puzzle created by Gabriele Cirulli. The premise was maddeningly straightforward: slide numbered tiles on a 4x4 grid to combine them, doubling their value until the elusive "2048" tile was formed.