That's great! I, too, use Godot for my projects, just haven't had the pleasure of exporting to Linux just yet, given how most of these projects were just university tasks that didn't need any exports.
On a side note, I wanted to ask something. Not that I'm claiming you should do this, but why not open-source? I personally feel like if I was making a public, non-commercial game, then open sourcing shouldn't be a problem, if anything some features/bug fixed might even receive community patches. So I just want to hear what's your opinion on this, are there any specific reasons (or maybe just haven't thought about it yet) ?