I wish I could post the source code, but I'm not quite sure who owns it as the wild west of Microbee software publishing didn't include niceties like contracts and copyright and whatnot.
You can also thank the members of MBUG (Melbourne) for "backing up" your game and then me for putting it on disk with menu back in the 80's to make it easy for my kids to play the games :)
Looking at the code, there is no Z80 code for sound in Prospector, just a good use of the Microbee Basic PLAY command.
Alan
I had a bunch of old Amstrad games I wrote in the 80s that I'll probably never see again. Silly little text adventures mainly, also learned binary by poking character maps... a bit sad they're almost certainly lost forever except for dwindling memories in the haze of childhood, super cool to see some of this stuff being preserved for cultural value if anything.
I didn't know the Amstrad used character graphics, they were uncommon in Australia.
Next time I visit my folks I'll check out and see if they have any of my old disks. I doubt anything survived this long but your post has planted a seed of nostalgia.