SECRET CARD BACKS:

ARACHNID
LOPO
LUNA
TEMPLE
TRAGEN

SECRET CODES:

DEJA VU (make sure that you put a space between the two words when you
type the code in)

Allows you to play the current hand over and over again.

HWNOSHUFF

The game deals you a new hand, then allows you to play the current hand
over and over again.

WUSS

Instant win.