Its easy to win. To gather heads, let the enemy kill some of your troops. When they cross the bridge (high point) the head of all the enemy that dies will fall towards your troops. Keep your attack balanced so the enemy dies on the slope. When you collected enough heads, upgrade all the buff and weapons to tier1 first. With all at tier1, you can mass upgrade 5 troops with buff and weapon. Then continue to crush the enemy or further upgrade.
To kill witches, dont spawn army 1 by 1. Instead, spawn army in stack of 3's to 5's.
To kill meat tank zombies, either spam Shovel Man or use Angry Mob superpower. If theres more than 1 meat tank zombie in the line, use the Harvester superpower instead. Wait till zombies come near to your base before activating Harvester.
For all thats worth, you can speed up the game in the beginning then turn it back slow when the enemies starts using harder mobs.
For last stage, save up quickly to get preachers. Use your superpowers instead of spamming army to save money. Preachers has fast conversion speed, converts those humongous meat tanks for you.
+1 for easy win.
aster game play - looney ,Unlimited ammunition - bin ,All weapons - rackem ,Level 20 - adiosturdnuggets ,Unlimited rage - prime ,Invincibility - trashly ,if this messege gets to the bottom copy and paste it let the cheats live on!!!!!