Heya, just popping in to check if you intend to have any official Linux version? I've recently swapped over from Windows to Linux, and I'm fine with restarting the game and not having my old saves, but I've been having some trouble getting it to run, so I figured I'd ask.
You can download nwjs from https://nwjs.io/ (pick the normal download suiting your architecture), extract files, and copy/paste them in the game folder (merge existing directories and overwrite files).
Then execute the nw file and you should be good. Usually double clicking on it is enough. Alternatively in a terminal:
./nw
Some distros also have nw binaries you can install system-wide with a package manager (for instance nwjs-bin in Arch's AUR repositories). But I am a bit less proficient with this method, so you may want to use a search engine for some tips.
Welcome to linux, hope it will suit you.
The person who commented below seems to be more knowledgeable about Linux than me, heh. Good luck if you decide to try getting it running on Linux!
I know some people have gotten Transportal to run on Linux, but the only OS I personally am able to currently test the game on is Windows. I don't currently have any solid plans to do a more dedicated Linux release... but we'll have to see.
Thanks for playing! ♥