Accessible Simon Description:

When the game begins, you
will hear 1 sound. You must press the keyboard key that corresponds to
that sound. If you are successfull, you then here 2 sounds. Then you must
press the keyboard keys that correspond to the 2 sounds in the exact order
the sounds were played. Each time you are correct, another sound gets
added to the sequence. You continue in this manner until you complete the
entire sequence of sounds in their exact order, or until you make 3 errors.