I tried to make it look like it does in the movie.
You are on the side of the defenders (Rohirrim)...eliminate all enemy units...protect King Theoden at all costs.
Elves will come to help you out a bit :)
I tested the map alot of times and everything works fine for me except for the gates of the second level of the fortress but it does not matter because they are there for aesthetics and if they worked it wouldnt be as exciting.
This map can be very hard or easy, depending on the way you plan your defence.
I hope you guys enjoy and sorry for my bad english.