Go into your Options and then go into 'Advanced --> Credits. Click the Skull a few times. You just earned yourself the SelfPhone, which replaces your Options button that you just went through earlier.

Code	effect
EarsplittingLyingParrot	25 Diamonds.
ItHurtsWhenIPoo	25 Diamonds.
LachhhCorp	25 Diamonds.
LarklenIsTheBest	20 Diamonds.
Test	1 Diamond.
WoebegoneHissingDog	10 Diamonds.