REACTION TIME

I AM LOOKING FOR ARDUINO PROGRAMMER TO EDIT INTO EXISTING CODE . LOOKING TO ADD FEATURE WHICH CAN SHOW ME AVERAGE OF REACTION TIME. ALSO WOULD LIKE TO RESET THE GAME USING ONE OF THE GAME ARCADE BUTTON NOT THE ARDUINO RESET BUTTON!! . ITS PRETTY BASIC . ABOUT GAME : I HAVE 5 LEDS AND 5 BUTTONS CONNECTED TO BOARD , GAME RUNS FOR 60 SEC, HAVE TO HIT AS MANY LIGHT BUTTONS AS POSSIBLE IN THAT TIME.