To enable cheat mode, you have to select the units, then click the woman's head on the left followed the woman's head on the right at the command menu bar at the bottom right of the screen. Now click the eagle that is between the two women. To unlock God mode, click the left eagle at the top bar with the date and time. To go to the next level, click the right eagle. Also you can select the "Armalite" on the command menu bar to reload your ammunition.