Lots of money.
Your mission in this great tower defense game is to place battle hardened soldiers in key strategic tower locations as you prepare to take out incoming waves of enemy combatants. Upgrade your troop manned defense towers as soon as you can for a chance of survival.
Use YOUR MOUSE to select and place units.
You can use 1-0 NUMBER KEYS to quickly select purchasable towers.
Press "C" KEY or select another tower to cancel a purchase.