Good Vs. Evil Effects
It would be great visually if the areas by the flags would be slightly visually different if controlled by good or evil. There could be darker, more overcast tones if evil controls the area where good would have brighter golden/light blue tones. Maybe the heart of the evil land could even have molten cracks and fire/lava and the good side could have heavenly beams of light or marble and gold features. and differentiate the good and evil buildings. roman colums for the good side, trees, water features and crags, caves, obsiden buildings for evil. as although each side has the same characters, one side is influenced/backed by heaven and the other by hell.