Quiz type game need help

Ej guys… im asked to make a quiz type game with categorie selection, levels, multiple chioce awnser en a kidy look and feel… but how to start, this is something i have never done befor…

i have a game board setup and a function that gets quistions and awnsers from xml, but now i think about it… i need levels, randomize… but also a system that keeps up what questions have bin asked already???

please help… :h: :book: