Hum... there are an hidden site-block "DRM" in the program to prevent theft, cause some people steal itch.io stuff to put it on their shitty websites full of ads, without permission and without crediting creators, even the HTML ones.
2 of my projects where theft previously so I made a custom anti theft protection powered by a strong code obfuscator specially for this project.
To make a linux port I will need to remove it, or the program wont run on your computer. And even if the code is minify I'm afraid of some kind of data mining / retro engineering and a potential unethical redistribution of my "intellectual property" :)
I will study the case, but I can't confirm anything for now, and also I cant test/debug myself a linux version.