A strange little side quest
The mechanics around Ma Puzzle have roots that stretch far beyond modern browsers. Alexey Pajitnov created Tetris in 1984 after drawing inspiration from pentomino puzzles, then simplified the idea around shapes made from four squares. A second detail makes the picture even better: 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. That long chain of experiments is part of why puzzles still feels fresh when a game finds the right twist.
