Been waiting for Moon Mystery's release on GoG since it launched on Steam. Bought it today, and played through the intro. I have to say, I'm looking very forward to diving in to the game proper.

I'm running it on Linux Mint with Lutris. I didn't need to tweak anything, it just installed and ran without any issues in Lutris using default settings (attached is a screen grab of the runner config).

Overall, very happy to see it here on GoG.

Edit to add: I'm running it on NVidia hardware with the 570x drivers, ultra settings. It looks and runs great!