Any plans to release this one (and your other titles) on Linux?
Depending on the licence in use, these might be of help:
As a sidenote, have you considered Godot Engine for future projects?
Great, didn't know about that 👍
As for Ubuntu, if you're on Windows, you can easily install it using WSL 2 and in the case of macOS there's always an option of setting up virtual machine via VirtualBox for example. No pressure, just sharing info :)