Player 1 (blue) moves with W,A, and D, and shoots with S. Player 2 (grey) moves with Up, Left, and Right, and shoots with Down. The first player to 18 points wins. Note: Unless you have a gaming keyboard with At least 6 key rollover, I would recommend plugging in a second keyboard. The controls tend to lock up with standard keyboards.
This is a remake of an atari 2600 game also by the name of space war. I made the physics engine for the scratch version myself.