is a game where you control a base that must destroy
rocks before they hit the ground, or you lose points.
You must also prevent "spinners" from touching the ground,
or your base will explode.
Press the Space key to start a standard game,
or E to start a game with "extensions" (more on that below).
Use the left and right arrow keys to move your base.
Use the bottom arrow key to use hyperspace: it instantly
puts your base at a random position.
Use the P key to pause the game, and to resume it afterwards.
Press the Escape key to quit the game.
Extensions include an occasional
falling question mark which, when shot, boosts your bases abilities
for a few seconds.
Also, bonus lives are given less often.