Enter during the game:
Invincibility - ddbouf
All weapons, full ammunition - ddgunhed
Level skip - ddlamer
Bonus level - ddhooker
Toggle high - speed and jumping ddsable
Toggle airboard - ddcstrike
Difficult enemies - dddoom
Kills Jazz - ddmark
Toggle escort bird - ddbad
Teleport - ddhocus
System infornation - ddcheck
Display "HAHAHA" - ddarjan
Display "GREETZ" - ddgreetz
Display "AWESOME" - ddtim
16 color mode - ddapogee
Quit to DOS - ddken