Engage in two-player local multiplayer combat for literally no reason!
(at beginning of game)
Player on the left: WAD to move, Z to attack. Caps Lock to dash right and Ctrl to dash left. Press ` to select a random visor color, and press 1 to return to default.
Player on the right: Arrow keys to move, / to attack. \ to dash right and ' to dash left. Press NumLock to select a random visor color, and press 0 to return to default.