
Native Support
Although this game has a Linux-native build available, Steam does not list it as having Linux support. This can happen if a game has an unofficial, unfinished, or unsupported build. You may need to force Steam to enable Proton for the game in order to run properly.

The Linux build is enabled by default, so this isn't a tinker report. Plays very well with a minor screen size inconvenience each boot.
In order to get the game to fill the screen, you need to press Escape (bound to the start button by default) to show the Flash window menus, then select View -> Show All and then View -> Full Screen. This will need to be repeated each game session.
- Use Lutris to install Windows Steam.
- Use Windows Steam to install Lume.
- Add Lume installed from Windows Steam as a game in Lutris.
- Use Lutris to Create Steam Shortcut.
Press the "start" button (the one with three horisontal lines next to the Y button) to enter fullscreen
Even though this game has a native Linux version, it does not launch right out of the box.
Forcing compatibility with any Proton version will make the game launch and run almost perfectly,. The only issue will be that the save game functionality does not work.
So unless you plann to finish the game in one sitting (which is totally doable) you need to follow my tinker steps listed above.