@Rogério Perdiz I managed to get it working. But it's weird, only a specific (unofficial) wireless controller seems to work on my Dreamcast. I replied to DarkPath above in full.
But to answer your question re. Emulators. I tried ReDream and NullDC. Both failed to register my controller presses.
Though the emulators themselves did register the controllers. Like I can navigate the ReDream menus with the controller, but it fails to play the game.
I've never used Flycast. I'll try that in future. But, as I say, I got it working now🥳
Great demo btw! I know it's not fully finished yet but really cool to see what could be possible 😎🤘