A strange little side quest
Money Detector: Dollars may feel immediate, but the ideas around puzzles have been evolving for a very long time. The first crossword puzzle book appeared in 1924 in a cautious initial printing of 3,600 copies, complete with a free pencil. That old idea kept changing rather than disappearing. 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. It is a good reminder that simple game mechanics can carry a surprising amount of history.
