One thing that would help, would be that if the three stats (lethality, infectivity, visibility) were listed as numbers, and when looking to select a disease, it listed how it would affect all of them more specifically. This way you could actually see how the different disease types changed the game.
i got it in 4 with all my upgrades maxed out. It's really not that hard if you have the rocket thing and radar to hit a ton of really high up yellows. on day 3 i made 4000 ft.
Occasionally guys i kill will ghost along the ground as corpses and pass under the gate, damaging my temple even when they're dead. This happens more often when I use the ability to slow everything down. Fun game, campaign mode was easy, but its hard to beat hard survival when guys you kill still take away life. >_<
Finer AI control, like "Maintain X distance" or "Stay out of range" would be nice. Especially with the sword and shield challenge, It's hard to keep the shield outside the minimum range and keep your sword from being stupid, because the normal AI for each isn't good enough.
Major glitch. I attacked a city, lost, then it said I won, gave me 15000 experience, and stuck me in a battle where I can't move or die or do anything with temple/castle guards attacking me