CARDIAXX:

        Pause the game and type any of the following:
        'H','E','L','L-SHIFT','G','R','A','C'_____________Stops timer.
        Or try 'R','A','C','H','E','L','SHIFT-G'

        'F','A','Y','E','R-SHIFT','C','CTRL','RETURN'__Infinite lives.
        'I','L','Y','C','A','R','O','L'_________________Invincibility.

        Also try

        'R','A','C','H','A','E','L','L-SHIFT H'
        'C','A','R','O','L','I','L','Y'