A strange little side quest
Between one round of Merge 2048 Card and the next, this is worth knowing: Alexey Pajitnov created Tetris in 1984 after drawing inspiration from pentomino puzzles, then simplified the idea around shapes made from four squares. It also connects to a different milestone: Pac-Man went on sale in 1980, and its creator Toru Iwatani famously linked the character's shape to a pizza with a slice missing. Not bad for a few facts hiding behind a Play button.