VIRTUALLY VIRTUAL   VR style graphics 
SWAP SHOP           Background music and new sound effects 
LITTLE WHEELZ       Over-inflated tires 
PI MAN              Wipeout mode 
ZOOM LENSE          Helicopter viewpoint 
BOX CHATTER         Murray and Martin sprite commentators 
BILLY BONUS         Four extra tracks 
CATS DOGS           Rain frogs instead of water 
OEAN ALESI          Round 16 in Championship 
TOO EASY            Grants first place on all tracks in arcade mode allowing access to extra track.      

Thanks to Revolution reader Mark Wiliams!