During gameplay, press ~ for the console window. Then enter any of the following "Codes":
Code
Effect
pikemon
Win Current Level
monsterbonus
Monster Fish Bonus Powerup
twominute
Two More Minutes Powerup
powercast
Power Cast Powerup
superpowercast
Super Power Cast Powerup
silentcast
Silent Cast
stealthboat
Stealth Boat Powerup
shallowboat
Shallow Boat Powerup
pikeflag
Pike Flag Powerup
bigpikeflag
Big Pike Flag Powerup
lunkerpikeflag
Lunker Pike Flag Powerup
manualcam
Toggle Manual Camera Movement
fps
Toggle Frame Rate
bonuslure
???
skipcast
???
metric
???