Punch-Space Dodge Left-Left Arrow Dodge Right-Right Arrow You can only punch King Hippo when he is in a swinging position (When his right arm is raised). You have one health bar (Immediate KO for both of you). Missing a punch -1 Heart Getting hit -3 Hearts Dodging a punch +1 Heart Landing a punch +1 Heart If you run out of hearts, you must dodge for 1 second to earn one back.
I used Google for PNGs and Mike Tyson's Punch Out for inspiration.