Greetings!
I am very happy to say that there is now a native SteamOS build of Super Video Golf available in beta. The SteamOS version is targeted particularly at the Steam Deck, but should work on all linux distros which support Steam and the Sniper runtime.
The most notable difference in the SteamOS version is the improved performance over compatibility mode, as well as the removal of z-fighting artifacts which can appear when using proton.
To access the beta go to the game's properties in your library and select the beta tab. From there select the 'other_os' beta.
Refresh Steam and the game should update with the new game files. When you run the game make sure the version number identifies the game as being the SteamOS version, in the bottom left of the main menu:
I've found that some versions of the client, particularly if you've already used the proton version, will prefer downloading the Windows version of the game. This appears to be a Steam client specific problem, but going to the game's properties page and then selecting the Compatibility tab can correct the problem.
Check then *immediately* uncheck the box for 'Force a specific version of Steam play compatibility' and Steam will then reload the correct game files.
A special thanks goes out to Kat for figuring out the Steam runtime build environment and creation of the build script for this one - as well as to all the other linux and Steam Deck users who have helped test this build.
If you find any issues with the beta drop a note over on the discussions, or join us in the Steam chat room.
Thanks!