A strange little side quest
One reason puzzles keeps producing good game ideas around Word Bird is that its history is full of strange turns. The name Tetris combines a reference to four-square pieces with Pajitnov's interest in tennis. And then there is this: In 1958, Tennis for Two used an analog computer and an oscilloscope to turn simple physics into a playable tennis-like demonstration. Not bad for a few facts hiding behind a Play button.