By Jared Jackson with Art by Ellana Jackson
To play Language Arts on a Windows machine: extract the .zip file to a folder of your choice then run the Language Arts .exe file.
To play Language Arts on a Macintosh machine: extract the .app file to your computer and run that application. Note that the Macintosh build has not been as thoroughly tested as the Windows build.
A manual with a walkthrough of the tutorial levels is provided here. Mathbrush assures me that you can play the whole game using the Help command instead of the manual (it's big), so it's up to you if you want to dive into the details, but I recommend it.