Thanks, and i agree the movie-based games are terrible, although the order of the phoenix is better, but they are all very short and all based upon the film version (which is shorter and different to the book)
In this game i am going to make all the locations available to explore.
And hopefully have a very good spell casting system.
Edit:
If you have any ideas you wish to contribute feel free to PM me, all ideas used will be properly credited to those who thought of them.