Very nicely made game but there are some minor irritations - You can get stuck as a paladin on many ground levels and boss areas! Hope you can fix this soon =).
There is a serious problem when you use prussians as defenders.......... If they stand out of your attacking range the battle can go on forever, especially if your walls regenerate >.>
Challenge 4.. hard? nah. Takes a bit of logic and time to work out how to do it. There is no lack of control.. make the sword follow the shield and control the shield EFFECTIVELY.