Mario: Left + Right Arrows = Turn Up Arrow = Go forward Down Arrow = Go back Peach: A + D = Turn W = Go forward S = Go back
The graphics are from the game "Super Mario Kart" for the Super Nintendo Entertainment System (AKA SNES, Super Famicom) This is completely based off of costumes with no variables at all. If Mario's costume is facing one way, he will go forward in that way.