You need 2 people to play. The first player uses W and S to move up or down. D to shoot and A to block The second player uses UP arrow and DOWN arrow LEFT to shoot and RIGHT to block Each time you lose, you get to upgrade yourself. The first person to reach a point goal, that you can set, wins! (for example: to win you need 10 points)
UPDATE LOG: 0.12:Added the ability to upgrade yourself after dying 0.11:Got the basic game mechanics to work