Phun has a console and follows the convention of making it accessible through the tilde key (~); alternatively, you can use F11. The console supports tab-completion. Hint: use tab at a blank prompt to list all the settings available in the global scope.

The language used in the console is a Phun homebrew called Thyme. See the page on Thyme to see the available console commands and variables.

If you mess up your settings, you can restore the defaults by deleting config.cfg in the Phun directory. You can check autoexec.cfg for some usage of these settings.