Very impressive game, but I couldn't get into playing it much because I had lots of issues with the joystick controls and I don't like playing games like this on kb+m.
The joystick worked out of the box but the axes were wrong, and I couldn't remap them in the game. The Unity launcher seemed to be the only place to edit the joystick bindings, but it didn't detect my joystick and I had to use another controller to map the axes and then edit the Unity prefs file manually to change the controller they refer to.
While using joystick mode I noticed the mouse cursor is invisible but still present, making targeting practically impossible with the mouse, and there's no button on the joystick for targeting.
Another quirk I found odd was that rolling with the joystick twist axis will roll the ship but not the camera, while pressing Q/E will roll the camera but not the ship. I suppose this is because in mouse mode the ship will rotate to match the camera automatically or something, but it felt very weird while playing with the stick.