Everything works great, except the monitor being used full screen, which spreads everything on modern 16:10 displays, which were not common when the game came out, so everything looks stretched, but you may get used to it. Music is not present in the gog.com version as it seems, but even the cutscenes show and even the menus for configuring the mouse and keyboard shortcuts work (which does not work on the current steam version (nor do the configuration menues).
(my setup: Tumbleweed Linux)