We've added in turrets to better counter enemy artillery. The Missile Silo turret targets and blows up artillery. The Shrapnel Shield defends adjacent turrets with a protective shield. The Anti-artillery turret shoots down enemy missiles.
We've also made the tutorial nicer looking and easier to follow. Additionally we've made a few graphical changes. Finally, we have balanced the game more and are still making it just right.
Have fun,
Core Reaction Studios Team