hey i have a ? on this game i complted everything the bad family is gone! credits rolled.. i went back in to help a friend with something and when i did it told me to find rocks to throw at the ship to make something fall so i can board the ship! where are the rocks?? went back though everythigna nd now i have an ice pick and can opener... don't know where to use them? pls help this is drivnign me crazy has for a couple days lol