Use guns, walls, and traps and defend your base. The Sniper Tower and Rail Gun attacks enemy units when they are in range. Walls deter enemies into taking other routes or slow them as they are broken down. Traps are invisible until triggered, at which point they will damage enemies. Place your Town Hall and Silos in the center and surround them with weapons and traps. Then surround that entire area with walls. If your base is destroyed, you will become immune to further attacks for a short while. You can use this time to rebuild your defenses and put together another squad. If you attack another human player, your base can be attacked again. Allow the Mushrooms to grow and create natural walls that will help keep enemies away.