One player: move with the arrows or WASD, punch with J, kick with K. Hold back to block, down to crouch, up to jump.
Two players: player one uses WASD with F to punch and G to kick. Player two uses the arrows with K to punch and L to kick. Game controllers work too.
Specials: down, down-forward, forward + punch is the forward special. Forward, down, down-forward + punch is the rising attack. Down, down-back, back + kick is the rush. Some fighters use kick instead; the pause screen lists each fighter's moves. When the star meter says MAX, press punch and kick together for the super.
Enter or Esc pauses and shows each fighter's move list. M turns the sound effects off, and the Music button at the top turns the music off.