Oh... I forgot the midair sprites. ARGH.
I imagine the game will have four buttons.
A(z on keyboard) = Punch (Side Punch is like the Smash Attack, and the punch changes depending on which direction you move)
B(x on keyboard) = Kick (Basically the same as punch except with kicks.)
C(c on keyboard) = Special (Uses your special moves, you know, like Super Smash Bros' B button)
D(v on keyboard) = Taunt (Do a barrel roll!)
Jump key, I guess will be up arrow key or the "A" key on the keyboard.
EDIT: I'm not so sure about shielding/guarding button though. This calls for customizable controls.