Quenzar's Caverns (1993) by Pulse Ventures Ltd.
I've found a site that offer the shareware version, but I think the game is abandonware since Pulse Ventures Ltd. doesn't exist anymore.
http://www.railentertainment.com/docs/pcgames2.php
(The link should be ok, I saw only shareware version of few games, if there's something wrong feel free to hide it)