_ To get all weapons, hold <COMMAND-SHIFT> and type "0WPN".  Note: The first character is a zero.

_ To refill the ammo for a certain weapon, hold <COMMAND-SHIFT> and type the number of the weapon, followed by "WPN".

_ To restore your health, hold <COMMAND-SHIFT> and type "IV".

_ To choose the starting level, hold <COMMAND-OPTION> and select "New Game".

_ There is a secret room full of weapons and ammo at the top of the fountain in the first room of the first level.  It may take several tries, but you should be able to reach the top of the fountain by running and jumping up the tiers.
