Codesimian requires java 1.5 and approximately a 2 ghz CPU for the more advanced sounds.
There are many ways to start Codesimian. Here are some of them...

Double-click Codesimian.jar and 3 windows appear.

or

Put Codesimian.jar in the same folder as Applet...html and double-click that .html file.

or

In windows, drag Codesimian.jar to your start button, then to programs, then to startup,
then release the right mouse button and select create shortcut or copy.
That would cause Codesimian to start every time your computer starts.
To stop it from doing that, delete (or move) what you put in the startup folder.

or

If your operating system is Windows, from inside Codesimian,
use this code to open a second codesimian:
	commandLine("cmd /c c:\\some\\path\\codesimian2.jar")

or

Assuming java.exe is on your path, on the command line, type:
	java -jar codesimian.jar c:\any\path\somecodesimianfile.cs

or:
	java -jar codesimian.jar

or, for example, type literal codesimian code like this:
	java -jar codesimian.jar sound(*(microphone 3))

or, for example, type something similar to any file inside codesimian.jar, like this:
	java -jar codesimian.jar open the self replicating window

or like this:
	java -jar codesimian.jar guitar in microphone hole

or like this:
	java -jar codesimian.jar puyo

or like this:
	java -jar codesimian.jar fractal sound

or like this:
	java -jar codesimian.jar play an mp3

or like this:
	java -jar codesimian.jar show me a list of commands

It will always choose a .cs file from inside Codesimian.jar,
even if what you type is not similar to any of them.
It will choose the least dissimilar.
Unless what you type looks like codesimian code and then it is executed directly.