The player controls the character Harry Potter from a third-person perspective. The game is split into seven sections, four of which can be revisited freely and explored to find collectables. Collectables in the game are either Bertie Bott's Every Flavour Beans, which can be traded with Fred and George Weasley for the password to a portrait guarding a special collectable, or Famous Witches and Wizards cards, which can be found throughout the castle or in exchange for completing mini-games.
Lower castle. Collecting yellow beans in exchange for Nimbus 2000 broom. Includes tutorial levels on climbing, jumping and flying and Charms class where you learn the Wingardium Leviosa spell. Ends with a boss challenge wizard cracker duel with Draco Malfoy and the grounds being unlocked. Mini-game involves shooting at flying items to get them back for a student.
Castle grounds. Collecting blue beans in exchange for a Famous Witch and Wizard card. Includes Herbology class, where you learn the Incendio spell, and Quidditch try-outs, where you learn how to catch the golden snitch. Boss challenge part way through is to defeat an animated gargoyle, and the race challenge is to catch Malfoy and retrieve the remembral. Includes Quidditch match between Gryffindor and Hufflepuff. Ends when you find a hidden sloth brain, that has been stolen from Severus Snape, and return it to him. Mini-games involve collecting beans in a time limit.
Castle Dungeons. Collecting green beans in exchange for Quidditch armour. Includes Potions class, where you learn how to brew the healing Wiggenweld potion, and Defence Against the Dark Arts class, where you learn the Verdimillious spell. You are trapped in the dungeons twice: once during Potions class which involves sneaking past trolls and a second time after the class. This second time requires you to destroy four dark curses around the dungeon to unlock the door. Ends when this door is unlocked and you can return to the castle. Mini-games involve sliding cauldrons onto grills without getting them stuck in a corner.
Upper Castle. Collecting red beans in exchange for Flipendo Duo spell. Includes Transfiguration class, where you learn Avifors, a race level against Peeves in the attic to retrieve your parcel, a level where you must use the invisibility cloak to sneak past Filch and Mrs Norris, a race level to escape the troll attacking Hermione in the girl's toilet and a boss level to defeat it. Includes Quidditch match between Gryffindor and Ravenclaw.
Diagon Alley. Side quest requiring you to collect ingredients for a potion to cure Hagrid's dragon, Norbert. Involves collecting coins in the mines of Gringotts Bank through control of a mine cart and using the coins to complete mini-games in three shops to get the ingredients. It is self contained and has no bean collectables with Famous Witches and Wizard cards only awarded for good performance in the Gringotts challenges.
Forbidden Forest. Side quest to find a missing unicorn in the Forbidden Forest as a detention. Red beans continue to be collected in this level. Involves defeating magical creatures and using known spells to solve puzzles. Ends when the unicorn is found and Hagrid gives Harry a flute which can cause animals to fall asleep.
Defeating Voldemort. Completing a series of challenges and boss fights (against the Devil's Snare and knights) using spells learned, flute and flying skills to solve leading up to the boss fight with Voldemort. After completing this, the game finishes with the Quidditch game between Gryffindor and Slytherin.