ON PC: Use arrow keys to move. Up arrows to jump. Stomp on Goombas and Piranha Plants. Collect Mushrooms to gain health. Don't touch Goombas or Piranha Plants or you will lose health. Other instructions are in-game. ON MOBILE: Tap the right side of the screen to move right, the left side of the screen to move left, and the top part of the screen to jump. Stomp on Goombas and Piranha Plants. Collect Mushrooms to gain health. Don't touch Goombas or Piranha Plants or you will lose health. Other instructions are in-game. In the final boss, make Bowser slam the floor until it breaks. Don't touch Bowser or his fireballs or you will lose health.