(I’m the dev) Feel free to use Godot RE Tools to paruse in the game project. I haven’t protected it on purpose so it would be easy to take a peek 😘
Not sure that there's a way to do this though, not without a downloadable copy. Itch serves a blob file, and even if you go to the itchzone url to get the game exclusive fullscreen, you can still only download the html container itself, and not the game.
It could just be that I'm a doofus that doesn't know the correct way to do it though.