For your next game I think you should expand on this kind of gameplay by instead of using solely 5 units you could go into the larger scale battle that go on against rival kingdoms. Along with the restriction of limited resources like food and steel that would require squads of gatherers.
The expanding chat is a little annoying because every now and then I have to refresh the page as the chat pushes everything below it off screen, I don't know if this is only for me but a scrolling chat would be a super convenient addition.