You need the character "Benny", who will be free after the chapter 7.
To continue the story, you will have to hack a computer, dice the (inevitable) first one who will serve you to build a spaceship, collect ALL the studs in the mini game. The last one is purple and appears in the middle when you collected everything.After you can complete the mini game.
Watch the video below for more info (credit to : deathmule)