First, let me say that you had me at "Mom, I started a cult".
I'll start with the complaints. Resolution. For a web integrated environment, I couldn't scale it and had find a monitor with better resolution than my main laptop screen. That means I had to move my laptop from my comfy couch position to my office with my dock. That's ok but I would have liked to change the resolution. Next, when I mouse over the cities the windows pop up automatically. This is annoying, at least for me. I would have rather liked to click on them and have it open. Also, I'm not sure if there's a loose condition. There also doesn't appear to have a win condition either. I've made it to aug 26th with all cities maxed and all upgrades purchased, with half a million dollars. It feels more like a one of those games were you just click away and eventually make your goal. Some do it faster, others not so much. That's ok, as those games do have a place. But it feels like it's not sure if it wants to be a clicker game or an rpg simulation.
The good things. I love the title. Like I said I was in at the title. The graphics and interface while simple convey the information you need to play the game. The audio is good if not repetitive but hey it's a game play loop right. The interface for each of the cities was well done. Overall, you did a great job.
Please understand that most of my gripes and my suggestions here are merely my opinion and I recognize full well that some of the things I'm pointing out really couldn't be accomplished in two days.
I would have loved to see more upgrades (I know time involved), some kind of lose situation showing it's an rpg sim with branching pathways and multiple events or some kind of active form of getting cash/followers. The passive methods/automated methods are fine but it should have some kind of activity for me to do other than wait patiently to click the purchase next upgrade button.
Great concept, would love to see it fully flushed out.