The person that starts on the right uses arrow keys, left and right to move, down arrow to attack, up arrow to block (you still take 2 damage per successful block). Same goes for player on the left (WASD controls) W to block, S to hit, and A,D to move.
Press the stop button on the top left once the duel is over and then press flag again because if you do not, the win screen will not go away. ---------------------------------------------------------------------- Updates 1.0: fixed several bugs involving player's hp and being unable to do damage. -----------------------------------------------------------------------