Just linking this information on the CU Amiga magazine coverdisk release of the game where the source is used, verifying that it's a piece of music composed for the game, even though it did not get used in the final commercial version:
http://amr.abime.net/issue_595
https://archive.org/stream/cuamiga-magazine-029/CUAmiga_029_Jul_1992#page/n21/mode/2up