Press CTRL-ALT-SHIFT-z to enable cheat mode and then use the following combinations to activate cheat effects:
CTRL-1 thru 5: Levels
ALT-1 thru 0: Rounds
SHIFT-1 thru 5: Cycles
CTRL-W: Auto-Win
ALT-W: Kill Auto-Win
CTRL-l: Add Life (lower case L)
ALT-l: Lose Life (lower case L)
CTRL-t: Add 1 minute
ALT-t: Subtract 1 minute