The naming convention ProjectName-Version-Platform.zip is extremely common for independent games hosted on platforms like itch.io or development forums like F95zone.
Because this file appears to be an from a third-party source: Golden_Mean-0,2-win.zip
This file might be a small design utility—such as a layout overlay or a calculator for digital artists—intended to help users apply the 1.618 ratio to their Windows desktop or design software. General Safety and "Deep Review" Caveats The naming convention ProjectName-Version-Platform