This game is fantastic and addicting, but I feel like - atleast I - would need a speed up button or 2x speed, because these little colonist guys build everything so slow and move so slowly :s
Please make a seguel. Different cities, different zombies, NPC's, and the zombies could attack your areas, so you would have to defend them with your turrets and NPC's.
I love playing god's by first making a land / world then adding lava somewhere there to burn whole world and trying to stop the lava with everything possible