Hi vlzvl, thanks for playing my game. My apologies that the control scheme was not immediately intuitive.
I considered having the combat exit immediately, but I was torn as some people may wish to read the final combat text. (I may make it an option in further revisions of the game).
I believe godot 4 uses vulkan by default, I did not realize the hardware support was limited. I will consider adding 'pre launch options' that will hopefully enable users to change the rendering pipeline.