Harry beware as Voldemort has managed to take control of the dementors and release them from Azkaban. The protection of Hogwarts now lies with you.
Cast Expecto Patronum before the dementors reach the Hogwarts Gates but be careful as they look to feed on your happiness.
If you manage to defeat the dementors then take on he who must not be named with all the spells at your disposal
Move Harry: Left = Arrow Left, Right = Arrow Right
Spacebar = Expecto Patronum (only for dementors)
A Key = Random Spell (only for Voldemort)