Prototype and full game are different
The itch.io page describes the prototype as an earlier project with unfinished elements, while directing players to the Steam page for the full game. Do not use prototype behaviour as proof of the current release.
Official availability
The prototype page lists downloadable Windows, macOS and Linux builds and labels it pay-what-you-want. Availability can change, so check the page before downloading.
Safe expectation
Use the prototype to understand its own version of fabric cutting, sewing and customers. For current features, platform support and purchase details, use the Steam store and in-game information.