I honestly enjoy this game. It is definitely a bit slow and the pathfinding is a bit wonky, but you get used to it after a while. If there is ore the miners miss, use mine current and they will normally pick it up (i like using miner brain debug to see what ore they are gonna mine). In general, using mine deeper is really helpful as that gets you more ore and gets you closer to getting another prestige point, which seems to happen every 500 depth. I think the pathfinding could be improved. Maybe keep track of a deep route so that the miners know how to get to the deepest part easily when you spend some time grinding up higher and then want to go deep. Also maybe make an adjustment so that when you want to mine deeper, all the miners mine one block instead of 3 separate blocks. They currently make a 3 wide tunnel down if wanting to mine deeper, but if they all mine the same block, it goes way faster.

Please keep working on the game. I really enjoy it and want to see what you have in store for it. Tell me if there is anyway I can help.