Mining wouldn't suit this game at all. Sure, it has cubes, minecraft has cubes and it has mining so it must work, right? But this, I believe, is a combat RPG at heart and that's what the dev wants.. a game about exploring, combat and the basic RPG elements with added features. being able to mine through the world would just derail most people of the true purpose of the game and have them off making mining shafts and making farms to collect resources when he wants the resources etc to be found in dungeons, bosses, mobs, treasure chests etc.