If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
The second task of the tournament where you have to swim through Merpeople.
Use the arrow keys to swim with Harry Potter away from the dangerous Merpeople. Collect all the Gillyweed as it will replenish your air and allow you to swim for longer.
Arrow Keys Left/Right - Rotate your swim.
Arrow Up - Swim hard.
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