Algodoo

2-player space ship game

Red Ship:
5,1,2,3 - maneuver red ship
left,down,right - maneuver red phaser
up - fire red phaser

Green Ship:
i,j,k,l, - maneuver green ship
a,s,d - maneuver green phaser
w - fire green phaser

For extra game dynamics:
/ - turn on middle lasers
<,> - rotate middle lasers

This is nothing extremely fancy, but it is fun once you get used to it.