Do you have any thoughts so far on supporting more than just Windows eventually, like Linux or MacOS?

Also what about supporting different rendering backends, such as OpenGL and/or Vulkan, alongside/ instead of DirectX?

Obviously none of that must happen right now or in the near future, just asking for your thoughts.

I would like to add Linux and MacOS support although Linux will probably come out first as I could test it alot easier. The problem with supporting MacOS is I don't have a Apple computer therefore it would be extremely difficult to even export the game for newer version of MacOS. Supporting different backends is fairly easy, changing the current one used ingame would probably prove to be more difficult than implementing a different backend. I plan to implement all of the things you've mentioned above in the future :)

Linux will probably come out first

That’s more than fine by me, I rather included MacOS for fairness sake.

I plan to implement all of the things you’ve mentioned

Are you sure though that you would want to keep DX, OpenGL and Vulkan up at the same time? My suggestion would be to go for OpenGL for now, as it is supported on all major platforms and goes far back in compatibility, and porting from that to DX and Vulkan would be much easier than in any other direction between those three. At least if memory serves correct.

Also what are your thoughts on making sure your game works in Wine so long as there are no native builds? Would that be something you’re interested in now or is that all later?