All upgrades add more.
Prepare yourself for an invasion...of pesky pigeons.
Survive the onslaught of pesky pigeons, marauding moles, lurching lice, and other annoying critters in this tower defense game. You're a rancher trying to make ends meet, but waves of pests keep stomping through your property. Select a turret, then place it on a white spot. Each enemy you kill earns you cash: spend your money wisely on new turrets and upgrades.