In order to win the game, you need to capture all enemy towers.
You capture neutral or enemy towers by creating a path from your building to those buildings. You can also bolster your own towers by sending units directly to them. Friendly units arriving at a tower increase its population, while units from the opposing team decrease its population. If a tower's population reaches zero, that tower is captured and now belongs to the opposite team.
Expand by capturing neutral towers, attack the enemy buildings directly, level up and upgrade your own buildings and use global powers to win a match. The game's difficulty increases if you keep winning.
Run the executable as an administrator.