good one. I might as well make it educational...
Here's another simple one.
Mushroom Life
and this not so simple game:
6 Billion - The Game of the New Millenium (Exponential Growth and the New Malthusian Scale)
6 Billion Game
Speaking of Malthus, here's an interesting exponential growth applet:
http://www.otherwise.com/population/exponent.html
Hey Beavis, I think we should like, uh, really know this - There might be a test on it or something
Doubling Time = 70/n years
where n is the percentage growth rate. Thus, if the growth rate is say 5%, the doubling time would be 14 years.
Basics of Exponential Growth
Keeping it interesting....