You can access the chat window if you press ENTER, and from there you can enter one of the codes below for the corresponding effect.

Code	Effect
/exp [amount]	Gain the amount of experience specified.
/god	Become invincible.
/heal	Heal yourself completely.
/item_add [item_id] [amount]	Gain the item specified.
/killall	All other ships in the system are destroyed.
/money [amount]	Gain the amount of money specified.
/pwn	Receive a bunch of money, experience, and skills.