MirthKit attempts to be the easiest way of creating and publishing high quality games. It is a downloadable application that connects to an online arcade. Games are created in the Squirrel scripting language, using a compact but flexible developer API. Game makers are free to publish their games on the online arcade as either open source software, or as commercial games using a new "the source comes also" model.

MirthKit is sponsored by Curved Infinity Games, which administers the online arcade and merchant billing system. Chase Adams, MirthKit's lead developer, is the sole proprietor of Curved Infinity Games. The core executable's source was previously closed source.