Wanderer is a boulder-dash style puzzle game made by Steven Shipway in 1988. I enjoyed playing the DOS port as a child - some of the puzzles were quite tricky for a 6 year old but that gave a certain air of mystery to the later levels which I never saw.
Arrow keys to move. Collect all moneybags then head for the blue X. If you get stuck, reload the page.
The original author of the game has made the DOS binaries and source code available on his site.