If you purchased Eets Munchies you will be given access to the steam version as well as the standalone version of Eets Munchies.
The standalone version and steam versions both use the same key. So when your standalone client asks for a key, just use your steam key, and you are good to go!
The standalone version and steam versions both use the same key. So when your standalone client asks for a key, just use your steam key, and you are good to go!