Thank you for playing the game! I think you misunderstood something there. The Desert-Area isn't supposed to be related to Harry Potter. It's the universe of another film. Maybe you can guess what it is ;)
Desert area was where I just got too confused by puzzles. My comment about HP connection was general, not about desert area . Imo, there is connection but just loose, but its only my personal opinion).
Well, I jumped over, but then in area with the little homes, I was a little confused what to do (then again, might be my lack of knowledge of the universe)