Once again...
www.moonstonetavern.co.uk
Great site for anything Moonstone, plus one of the regulars there made up a WinUAE version of it all fully configured without extra clutter (and not much larger at all) Quite frankly, its brilliant. You just need to throw it somewhere on your HD and run the .exe
Its found under the emulators and abandonware menu.
I strongly recommend getting the amiga version. The sfx are superior, the AI of the black knights isn't quite so stupid and the Dragon's flight path isn't quite so focused on killing a particular knight (he attacks you when your under him but doesn't beeline in the amiga version so you can avoid him if you need to)
Go visit his site, its worth it. If its down for some reason send me a message and I can send it to you but its in better taste if you get it from there.
I managed to actually finish the game in 1player mode in this version, so no bugs that I'm aware of.. or found.