Space defense

Stop the tricky alien spaceships by blocking them with your rocket but watch out for those asteroids.

Select a game play mode:

Automatic play will demonstrate how gameplay works.

One-switch no fail mode has the computer make the correct choice but has the player press their button to continue.

Full play mode has the player making the choices.

The player controls the rocket directly using the buttons or left/right arrow keys, or 2-switch mover/chooser access using Space and Enter.

Enable sound

Include occasional asteroids which must be avoided

Use the gear icon in the upper right to come back here from the game