Playability: 3.5
This scenario was a tricky one, for the first time I played it I loosed it too, as the charging uruks occure a "little" chaos in the keep, they charge the archers and quickly rush to the keep. After I have examined my troops I've made the strategy. I've slowed down the game speed to the minimum and sent all my archers to the keep and forced all my melee troops together and in a few minutes all the attacking forces died. The fun part ended here as most of the macemen stopped at the walls, then I had to clear the whole map of the "inactive" enemies, which was a bit boring as they didn't attack. Anyway this is a pretty good and very playable map.
Balance: 3.5
Here I have to say that the map was too easy, or at least with the strategy I've used, but I assume everybody would do this. For newbies this map would be a great challenge, I think.
Creativity: 4
I've played too many Helm's Deep maps and this map didn't look a very creative one... for the first look! The idea of taking the role of defenders after the breaching of the wall makes the map very original. And putting the unemployed peasents behind the castle is a very good idea too. Congrats! :)
Map Design: 3.5
The castle design looked very good, it felt epic, probably this is one of the best Hornburgs in Crusader I've ever seen. However the area surrounding the castle looked plain and felt a bit rushed too again.
Story/Instructions: 3
Better written than your other stories, but it's still too short, I repeat myself: write longer stories.
Additional Comments:
A unique and very entertaining Helm's Deep map you've made there. Thumbs up. ;)