Recommended browser: Google Chrome. In case of lag, try without 'full screen'. Click the green flag to start. Once the intro has finished, you can walk around by pressing arrow keys, pressing WASD keys, or clicking/touching the stage. There is no 'action' key; just walk up to objects, persons and creatures. For those who feel this game is difficult: it can't be half as bad as Harry's ordeal in the Triwizard Tournament. But yes, it takes perseverance and sense of direction for anybody to complete this quest. Please feel free to help each other out in this forum topic: https://scratch.mit.edu/discuss/topic/342835/ Good luck, young wizard!