You are the Prince of Zaphris and were just in the process of coronation when you discovered that you had misplaced the crown. Your quest is to find the three previous metals and make a new one. Only when you have done this will you be able to be crowned king.
Notes
Developed back in 1986 but, although it was submitted to various publishers, it wasn't released until 2023 when the author recovered and digitised the files. See itch.io for downloads.