Cloner4000... Great...I am sure you will enjoy the Powerful "Toys" the Authorities will gain later in the game. Yes, Higher Game play Levels will be tougher not only due to the AI gaining more units but the Human Player will have more corruption and less ability to build as fast. The AI also work together and trade more on higher levels.
bkwrm79...King Arthur and I live on different parts of the world so the time difference helps with any so called shifts
It sounds like your game as the Farmers is going very well. The Farmers really have the best of it in this game due to their ability to make peace with the Zombies and the fact that they are not at war from the start. Of Course IF you use Bubba to Rescue Sam Hammer on turn two, you will be at War against the Zombies...but I always do this. I gain Sam Hammer and the Zombies are not yet strong enough to cause me any real problems. I sue them for Peace several moves later and they pay Big Supplies for it which really help me. I can keep tech research at the highest level and gain techs fast as well as afford to buy units I want.
...exploding Sheep can be stock piled until you have as many as you want to launch a massive attack. They do not require support so it costs nothing to build many and keep them.
Prepare yourself for the Mid to end game because the Zombies will surprise you. They will be very strong and you will probably be the only one remaining other than perhaps a couple of buildings that the Zombies may not bother with until later.....so they will all come for YOU in force and with much stronger units.
One technique you can use is to go after buildings that will cut the Zombies territory in half. This will cut off many buildings from their Bastion and effectively put a damper on them.
Players can choose to Raze any building they want but most buildings have Key or Minor Locations so the Zombies will not Raze them. I recommend keeping all buildings because all will benefit you greatly. Good Luck