Tower Defense Game Example

This is a Unity Tower Defense Game Example and comes with complete and free video tutorial at: http://cubeproduction.net/?p=567

This game example and tutorials include:
Complete code written in C#
Enemy Spawn System
-Waypoint AI (zombie can move along a path)
-Custom zombie category, amount and wave control
-Zombie properties control (speed, hp...)
Tap To Build Weapon System
-Straightforward Touch Input control
--no need to drag and drop
--all you need to do is tapping
-Weapon Selection
-Weapon Upgrade
-Weapon Sell
-Expandable Weapon System
--Unlimited Weapon Selection
--Unlimited Weapon Levels to upgrade