Arrow keys to move. Up arrow to shoot. Space to change spaceships. Click the buttons on the right side of the screen to buy abilities. Hit 1 or 2 key to activate an ability, (1 is for the ability on top, 2 is for the ability under the first.) Abilities are one-time-use, if you buy one you can use it once, if you buy two you can use it twice, and so on.
