Could not get the Epic Games version running through Heroic to work but running the Linux version is perfect, even with custom maps. From what I tried though, the Linux version of Olympus won't work with the Epic version of Celeste (said something like "The version of Celeste you have is not the same as your version of Olympus. Make sure they are the same before trying again."). Custom control layout is great while I slowly get used to doing diagonals on the Deck's dpad (they're very annoying)