What does the "Code" key do?
Some custom keycap sets have a "Code" key, but those are (mostly) recreations of keycap sets from electronic typewriters, where the "CODE" key worked like both Alt and Function, with some combinations producing symbols and others producing actions.
I see that the keyboard has a toggle between Windows/Mac mode and a keycap puller, but I don't see that it has any Mac keycaps ...
(At least, I don't see any anywhere in the pictures)