To run the GizmoBall editor, type:

java -jar se031.jar 
java -jar se031.jar -help

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java -jar se031.jar -edit mario1.xml

To control mario, use the left, right, and up arrow keys.
Press the A key to start the goomba sources.

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java -cp se031.jar smb.TestGame

To control mario, use the A, W, and D keys.
To control luigi, use the left, right, and up arrow keys.

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java -cp se031.jar asteroids.Game

To control the ship, use the up, down, left, and right arrow keys.
Missiles are fired continually by holding down the space bar.
Bombs can be fired with the S key, and detonated with the D key.
Holding down the A key will shield the ship from damage, but
the ship will be unable to fire while shields are active.