Level Select:
Password "XAXYYYYYZXYY".

Play as Human Prey:
Password "YYXYZYYYZXYY".

Play as Rex:
Password "AYYYXYXYYZYY".

Play as Raptor:
Password "ZXYYYZXYXYXY".

See Dinosaur Galleries:
Password "XZXYXYYYZXYY".

See Compy Gallery:
Password "AYXYXXZXZZYY".

Thanks to Revolution reader Pedro Rosado!