How to choose
If you want a duel of deduction, play Battleship: every shot rules out possibilities, against a computer that plays for real. To think quietly about parity and symmetry, Nim has a perfect strategy waiting to be discovered. If you prefer reflexes over calculation, Snake is the arcade classic that never stops moving: the longer the snake, the harder it is not to cross yourself. If you only have two minutes, Tic-Tac-Toe plays fast on three difficulty levels. Stack! is the house precision test: drop the sliding row at the exact instant and take the tower to the 12th layer. In Rebound, the duel is in real time: a paddle on each side and the ball speeding up until someone closes out 5 points. And Arrows! is the site's shortest reflex test: press the right direction before the arrow disappears, with three lives and a belt that only gets faster.