It's even hard for ME. And I made this! Arrow keys to move. Down arrow to eat your tootsie pop, which heals your health. (Don't use this all the time because it does take most of your time. Plus, you can't move when you are doing it.) Space to Ultra Punch. (Nightmare moves as fast as lightning so make sure he's still before doing the punch)
Credit to Proseph and RoyalToHisLoyal and PIZZAZZ