Movement
To move left or right, press the left and right arrows on your keyboard (WASD also works in single player). Holding a movement key will make your character run, while tapping it will make them take a short step. Pressing G by default will make your character jump. If you do not have a sword equipped, standing over one and pressing down will pick one up. If you press down while running, you will roll. Tap down while running, and you will do a cartwheel. Cartwheeling and rolling can also be used to pick up swords.

Attacking
When holding your sword, there are three positiongs you can hold it in: High, Middle, and Low. You can move your sword higher or lower by pressing up and down on your keyboard. To attack from any of these positions, press F. You can also throw your sword by pressing up until your charater is holding their sword in a throwing position, and then pressing attack. You can perform a dive kick by jumping in the air and attacking, and a low kick by rolling and attacking, or ducking and attacking.

When you are without a weapon, you can only perform an unarmed attack from one height (standing), and it does not kill in one hit. If you land enough unarmed attacks of any type (1 dive kick, 1 low kick, or 2+ punches), the enemy will fall to the ground stunned, at which point you can finish them off by pressing attack.

Defending
If you attack an opponent and they are holding their sword in the same position as you, they will block it. For example, if you make a low attack against an opponent who is holding their sword low, your attack will be stopped. The three positions also defend against dive kicks, low kicks, and thrown swords:

-Thrown swords are blocked by the High and Middle positions
-Dive kicks and regular jumps are blocked by the High and Middle positions.
-Rolling is blocked by the Low position
NOTE: Blocking a dive kick or roll will kill the attacker. So just like in real life, don't jump into swords.

Another defensive move is disarming your opponent, which knocks their sword out of their hands. You can do this by moving your sword into their attack. As an example:

-Your opponent attacks high, your sword is in the middle.
-If you move your sword to the high position before your opponent hits you, this will disarm them.

To win, you must move past your opponent's end of the screen until you are eaten by a giant flying horned worm.

No, really.