This is an interesting simulator, and the experience was different from what I expected. In respect to your first three games posted on your account(which I cannot comment on sadly), I found the simulations very well thought out and simple. The only thing that may need to be worked on are the graphics(the fire in the fire simulation, and the humans/village in the population simulator). Besides that, the concepts are relayed smoothly and simplistically throughout. All of your simulators are neat. Keep it up!