FYI, I was able to use the electron version installed on my system and run the game by running the command:
electron resources/app
from the linux folder. It looks like it's just the electron version bundled with the game that is the wrong format.
Viewing post in What Isn't Saved (will be lost) comments
go in a terminal and type:
# echo electron /path-of-the-game-executable > launcher.sh
# chmod +x launcher.sh
replace /path-of-the-game-executable by the path to the game and you can call the launcher whatever you want. Put the launcher on your desktop and just launch it whenever you want to play. (also make sure you have no file called launcher.sh in that directory)