Put out 50 burning towers
Upgrade 15 towers in a single battle
Use Thor's Hammer succesfully for 50 times
Disable 200 ninja cows
Disable 25 cows by freezers
Disable your first cow
Disable 25 cows by archers
Disable 25 cows by wizards
Earn 5 barrels of milky Milk
Disable 25 cows with artillery
Sell 40 towers
Build 4 kinds of towers in a single battle
Put out the same burning tower 10 times
