Thanks a lot! I wanted to do something a bit different than the typical city health - this way once one virus gets past your days are numbered and more viruses makes that reduce quicker.
Completely agree about the balance. I focused some time on that first turret but need to go through and balance things a lot better. Perhaps different costs for different positions and more variation in the environment so the view is different for each one (what I was going for with the raised turrets in each quadrant).