Added another upgrade for the Support Tower. The shield tower.
The shield tower protects the adjacent towers from being disrupted. It does however lose the detection ability.
Missile Towers and Crystal Towers now each have 3 upgrades available at your command building.
Adjusted the difficulty of some of the levels
Increase early income.
Dragon Tower is redesigned. It will now place a DoT effect on units that pass by which ignores armor. Still highly effective versus Light and Biological units. The DoT does not stack so placing many next to each other will have almost no effect.
The Scorch Tower has a more powerful DoT that also increases the amount of damage the enemies take by 2%.
You can now destroy towers. You get nothing back though so not sure why you would. Might add a small refund later.
