To  execute  a  forward  combo,  press  [W]  to move forward when
starting  a  series  of  attacks. This is most effective when facing a
single  opponent.  To  execute a left/right combo, press [A] or [D] to
move  left  or  right  when  you  start  a  series of attacks. This is
effective  against  multiple opponents. To execute a chop combo, press
[S] to move back when starting a series of attacks.

Evasive Movements:
Backflip                Away and Jump.
Leap Sideways           Press Left or Right and Space.
Forward Roll            Click Forward two times.
Side Roll               Click Left or Right two times.