Previous discussion about this game:
http://karoshi.auic.es/index.php?topic=2352.0I like it A LOT, and back then I contacted Keith Erickson. He was very kind and provided me graphics, maps and information about the game. I even started a proof-of-concept but due lack of time, lack of experience, and my other project, I didn't even finished the routines to draw screens. I hope to be able to retake the development as soon as possible, now that I have more Z80 experience than then.
I should warn graphics are very tricky, both scenery (when the lava is rising there are a lot of tiles) and sprites. Dynamically rewriting tiles and sprites will be necessary. Technically speaking, is a very intereting project!