Is there a possibility to connect the old Arcade joystick, with 9 pin connector, on the usb port.
That would make it all complete to 100%
Are there adapters available?
Sure, there is load of them!
Or you could make your own joystick! - (Like me) - Can't wait to see how well (if at all) it works on the mini.
You could use a Keyrah,and use a real C64 keyboard too..