I don’t know what I’m doing wrong but I can only get to five locations. I’ve looked at the map and I can’t find any of those locations in the game.

The problem was the convertor I was using. I've used a tap player to record to cassette and now it works. It's a fantastic game!

Does this use some kind of fast load system? I have converted the TAP file to WAV and recorded it to tape and I get a tape loading error at the end of loading every single time.