it's good concept and game, but some problems in execution. my comment will be: fix the reward system. no way last place is $8,000 and 4th place is $13,000... each increase only $1,000?
it makes no sense to say you can customize your upgrades, when they increase in price exponentially. if you focus on one path, that path should be cheaper than going other paths; otherwise it makes you focus on being a generalist with the same level of upgrades for each type.
I also love the replay button. It reminds me of what they had in Civilization. But I would definitely like more statistics: how many people you saved, how many people you lost, etc.. so you can better evaluate how well you did. (Currently just see how many bridges and zombies left).
Can I report a bug? I didn't have enough money to pay for the marketing so there was a message that said to reduce it. I reduced it and the day started, but all the customers are stuck at the entrance, only one came in to buy something, and now the day is going on forever... also the speed up button and other things along the bottom are gone.
i think i would like it, but it's just too hard to get into. i think the protector series goes down with each new release, too much new stuff and not user friendly