Hi,
The game was created for the Amiga platform using AMOS Pro (a type of BASIC language) as all of our creations for the Amiga so far (no game engine).
Unfortunately there is no option for tagging Amos as a developer tool when setting up a page like this on itch (it accepts only selections from a dropdown list).
Unity and HTML5 is probably Iisted becouse the header of the site that is made with Unity. While there is no option for add and automaticaly play music on the page (and no option for embeding pic/video/music on the page other than a youtube link) i take the option to make a HTML5 "thing" (made with Unity) that can be put in the top of the page. I put the logo in it with music. (A few of our projects is used this solution.) With that we can have a logo, animations, music, etc.
From that point the site (ITCH) automaticaly tag Unity and HTML as tool and platform. Sorry for the misunderstatement! :)