If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
It's the Qin Dynasty in ancient China. Your mission is to accumulate as much gold as possible in each of your own war campaigns to help the emperor build the Great Wall. So gear up your army, pacify the lands, make as much gold as possible, conquer and survive to show them you are the battlefield general! Good luck!