There's now cloud saving
And you can also access the old version of the game through beta versions.
The old version of the game is only available on Windows. On Linux or SteamOS, you'll need to enable Proton.
Source: Steam Community (opens in a new tab)
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 19290828 · public branch
Steam updated · First observed