

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.

I could not launch it natively, had to force it onto Proton to get it to work

Requires Proton override (tested with v9), won't work properly with Linux native.
With native Linux support will fumble monitor detection, require a tty session if you have the unfortunate idea to ALT+TAB, or outright crash if you change video mode to windowed.

I could only play on windowed and so was kind of forced to play on a smaller resolution. Not ideal but still fun.
The game would force back to 800 x 600 windowed.
Without forcing proton experimental the game instantly failed to launch.
Starts good (force Proton for window mode)
Played with Proton 7.0-5.
Without Proton game fails when switching to window mode.
Running without forcing proton makes it try to spread across all screens.
Native version definitely has multi-monitor issues which sucks for a game called Multiwinia. Could not get it to use primary monitor or use Windowed mode. Use Proton Experimental instead.