I just thought I'd say that I really enjoyed your game on the ZX Spectrum. I was running it on a ZX Spectrum Next at 7Mhz. I completed it on my second try. It is very intuitive and I would play it again.
The graphics are very clearly defined, it has a good sized map to explore, and the puzzles are well thought through.
Although a PC version would be good, I would very much like to see an extended or enhanced ZX Spectrum Next version if that is possible. I think this sort of game is ideally targeted on an 8 or 16-bit home computer, and I think this is where you are most likely to get support for a future expanded version. Many thanks for a great game.