A strange little side quest
The mechanics around Circle's have roots that stretch far beyond modern browsers. Women competed in Olympic archery as early as 1904, making it one of the early Olympic sports to include women. And then there is this: Spacewar! appeared on MIT's PDP-1 in 1962 and became one of the earliest influential computer games shared among programmers. That history is one reason familiar mechanics can still feel new when they are recombined well.