Only the current version so far — new entries appear as the game ships updates.
At the beginning of the game, the cup containing the ball will be briefly displayed, and then the three cups will quickly exchange positions. Click on the cup you think is hiding the ball to answer. If you guess wrong, the game ends. As you answer correctly continuously, the speed of transposition will gradually increase, testing both memory and reaction.
The game does not require internet connection and can be played anytime, anywhere, suitable for playing in fragmented time.