Use the Arrow Keys to change the amount of correct key presses required, then press Space. You are now being timed, press the keys displayed on the center of the screen. Keys will continue to appear until you correctly press your previously set amount. After you've completed game, you will be shown 2 scores: Ratio, and Time. Your time is how long you took to press the set amount of keys correctly. Your ratio is the ratio of correct and incorrect keys pressed.
Comment your scores below!