Enter the extras menu then go to the password input screen and enter the following codes.

Password	Effect
3Z7PJX	Fast Fix
6JBB65	Invincibility
FQGPYH	Silhouettes
PEHHPZ	Score X3
S5UZCP	Score X8
SNXC2F	Fast Build
SZFAAE	Money
TUXNZF	Fearless
TY9P4U	Ice Rink
U38VJP	Score X2
UU3VSC	Beep Beep
UXGTB3	Score X4
V7JYBU	Score X10
XWJ5EY	Score X6
XYAN83	Fast Dig
Y9TE98	Disguise