The technical nomenclature of the archive provides immediate insight into its purpose:

While a single .zip file may seem mundane, SecretSummer-1.0BETA-pc.zip encapsulates the labor of an artist or small team. It represents months of coding, writing, and asset creation, now condensed into a few hundred megabytes, waiting to be unzipped and experienced for the first time.

: This confirms the platform (Windows/Linux) and the packaging method. Zipping the files is a standard way to preserve the directory structure of engines like Ren'Py or Unity, which are frequently used for such projects.