Using your mouse, set your turn options in the control panel. Each panel is broken down into different actions you can take during your turn.
In the map your city is located in the middle while your enemy's countires are on the outside. Each country starts with five cities, and the bigger the buildings the larger the population.
In the middle of the coutries shows the current action for that turn.
For a more detailed description of each panel click 'How To Play' on the main screen of the game.