Select 'Options' from the main menu and then select 'Unlock Rewards' and enter the following codes for the desired effect.

Effect	Password
500 Golden Gems	HDTQ JCLO SSUU.
500 Golden Gems	SRKC RDZR KZAE.
750 Golden Gems	FBRY CMTR KXUQ.
750 Golden Gems	OAZN CEYQ XRDT.
Claw Upgrade	PLQO ILQJ YKEQ.
Cyan Color	LYYD UAXR IPRT.
Green Color	LCYH FVQZ XEVB.
Head Upgrade	TDFS ZITF BKYE.
Ice upgrade	PLAL TALG JPZV.
Mutant Wasp	CHYV UEMJ QVGM.
Red Color	QODI LHGH HNBN.
Shock upgrade	WLUA DZCN ZNKE.
Yellow Color	TZCK AXZJ VSTW.