While the game has a certain instant appeal, it is poorly designed. It’s chock full of things that doesn’t make any sense and/or are just irrelevant noise that has no bearing on the actual mechanics.
It’s attempts at varying the challenges as you progress through the different pathogens are not backed up by a base system that allows you to use strategy to manuever the obstacles. Rather it pushes scripts on you in order to force certain scenarioes to occur. In effect, it simulates an AI, but doesn’t actually posess one. Some of the premises are complete nonsense and not in a funny kind of way.
In the end you feel like you’re playing some sort of idiotic digital combination of whack a mole and an artificial puzzle game, none of which are remotely interesting or engaging. Once you’re past that initial glee of eradicating humanity, the game has nothing substantial to offer other than a regret of having bought it.