During gameplay, type in these codes (single player game only):

jjgod		God mode
jjinv		God mode
jjguns		All weapons 
jjammo		All ammo 
jjrush		Sugar rush 
jjfly		Helicopter ears, type again for hoverboard 
jjk		Self destruct 
jjshield	Power shield 
jjnext		Level skip 
jjlight		Fully light level 
jjbird		Bird assistance 
jjcoins		Get coins 
jjgems		Get gems 
jjending	Return to main menu 
jjq		Quit to desktop 
jjmorph		Change into Spaz, type again to become Bird, type again to become Frog,
		type a fourth time to change back to Jazz 
jjkill		Suicide
jjpower		Power Ups