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Great!  JFG was defiantly my favorite game from my childhood glad it brings back the nostalgia! Unfortunately, Coppercube, the engine Galaxy Luna was built on currently does not have native Linux support. So the best you can try is running it on Wine or https://www.playonlinux.com/en/

Ah ok.  It looks like the only feasible cross-platorm binaries that Coppuercube exports to is HTML (WebGL), so I will try Wine.  Thanks!