I'll give you a few tips but it's pretty straight forward. Click on the squares to build buildings. You need to put people to work in your factories so make sure you build houses. Then in the bottom left, add the people to the factory. Buy ammo and click on the attacking enemies to kill them. Once you build a building click on it to upgrade it to the next level. You can also build ditches for military units. When you have military units, click on an outpost to add units to it. Good luck and have fun!