PC controls: Use the left/right or A/D keys to move, up or W to jump. X to switch characters while playing the game.
Mobile controls: Use the joystick to move and jump. Tap the button in the bottom left corner to switch characters. Avoid touching enemies, or you'll lose health. Jump on Goombas to defeat them, collect 20 coins to heal, get hearts to heal, get to the flag to move on to the next level.