Linux is a little hard for us to test for, since we don't have a Linux distro set up to test on and Unity only seems to recommend Ubuntu 12.04+, which is the distro they are supporting for all Unity based games. So I'm not sure how to fix that. You may need install additional libraries needed to run Unity games. Which ones? There isn't much information on that. I wish I could be more helpful for you there x_x" If you do fix it, let us know how you did it, because that'd be great!
Viewing post in Paizuri University (NSFW 18+) comments
I mean it seams like a basic Visual novel and many people are using ren'py for that. And Ren'py games work pretty well on linux. Or I'm not totaly sure but Godot should have a unity project import (or it's planed) and that should also work well on linux. Ubuntu 12.04 is pretty outdated and Ubuntu 18.04 is the newest. I mean you could try it in a virtual Machine because Ubuntu is free or there are other dev's they know what to do to fix it.
Ubunto 12.04, is the lowest possible version that will run unity games. The + means anything above that version should also run Unity based games. So it should run in the latest version of Ubunto. And if it runs on Ubunto (and other devs aren't having issues either)... it should run on Ubunto.
Paizuri does appear to be a basic visual novel, but under the hood it's capable doing a lot more then most VN systems out there. For one, we can do fully in-game animated H-Scenes (they're not rendered videos btw) which leads to smaller build sizes. It was also built with WebGL and scalability in mind. So if we wanted to do something that was in full 3D with VN style dialogue, we can.
Ren'py has it's limits. Try doing something in 3D for one. It also can't do a lot of things we want to do, like certain visual effects, WebGL or fully animated H-Scenes (that aren't a 200mb+ video file). It also isn't very scalable beyond a VN style game, at least not without a battle.
I've heard great things about Godot, but code can never be done as a straight copy or import. You would have to migrate your code base which means re-doing everything, so that your code can actually leverage everything Godot has to offer. IF we were ever going to use it, I'd use it for a new project and build from the ground up, learn it properly, and make use of what it has, and optimally. Migrating a whole project to an engine you know nothing about is not something you do lightly.
So with all that said... I'm looking into a VM to run Ubunto. So if it runs in Ubunto... it runs in Ubunto. But if you (or anyone else) run it on Ubunto, and have issues. Let us know.
I tested it out on the latest Ubuntu distro and there is something wrong with the x86 files. Older releases seem to work, but newer ones do not. I have a feeling it may have been something to do with updating Unity and our build process not playing nice with it. I'm looking into a fix and will keep you posted! : )