The most obvious use case is to run the simulator code on your computer and run actual simulations with it. Below we have an example screen where the program code is on the left, and the running simulator is on the right. Changing any of the +60 inputs is as easy as making the change in the text editor, and running your simulation again. The performance is somewhere between 100 and 1,000 simulations per second in the current Python code which is intentionally left as verbose as possible.
Get the right version for your use from here: http://farmism.org/versions/