For new games you should enter your email address and the email address of the person you wish to challenge. The address you enter will receive an email challenging them to join the game with the name you choose. Each city has a certain amount of labor points to distribute between five categories each turn. The five categories are harvest, mine, fortify, train, and ordain. Harvest - produces food.
Food is consumed by warriors, veterans, and priests.
If the food supply disappears, morale goes down as well as other possible unfavorable outcomes. Mine - produces metal. Metal is necessary for warriors to become veterans. Fortify - increases the city fortification level. Fortification bolsters your defense against attackers.