Two-Player Co-Op. I have pitiful sacrifices made to get all star coins so I could move on to the next level without having to go back. I basically kill my self off to get a star coin while my sister goes pro and runs through the level as if it was nothing. It is also fun because me and my sister have hilarious panic attacks when we are about to die! I'm like : OOOHH S***!!! Those creatures known as "Goombas" are EVIL!!! THEY ARE EVIL, I TELL YOU, EVIL!!! I always die when I'm in the first world because of those damn Goombas!