Scroll the game panel up a bit, turn off the mute button and click start game. A Morse code letter will be played, key it back on the iambic keyer. Pad 1 is for dits. Pad 3 is for dahs. (Dots and dashes for those new to Morse code.) Get it right and the game plays that letter and another random letter back out to you. After successfully sending each sequence back to the game, you get a one letter longer sequence. Just like the handheld Simon game. Link's below