I do not know if this has been commented before but i believe the game needs to show your average earnings/minute. It is very important to know if it is more worthwhile to farm a lower quality rock that will earn you more coins (because of higher tier rock defense) or not. Another thing that needs to be implemented is a statistics tab: how many rocks I`ve mined, How much coins i earned and how many gems i`ve earned, how many crafts (picks), how many upgrade and how much money i`ve spent on upgrades and so on.
Nice game, issues with necessity of potions and skill up to the final boss. Farmed high xp rewarding training fights and maxed on items and jewels. Pretty challenging last boss fight but all in all 4/5
There is a bug with moving your troops that makes the troops stuck while they have just exited or are about to enter a castle. 4/5 for effort and gameplay, still needs lots of upgrades and more info panels about units and effects
Awesome game and hopefully some good people will support your efforts with some donations. Until then, a warm thank you from myself and hopefully that you shall endure steadfast and with patience all the challenges life will throw at you. Always remember that sometimes a heartfelt encouragement in times of need are more valuable than any financial motivation you can get.
Please add a feature after you get all upgrades to stop getting coins from enemies. It is useless and laggy for slow computers, thus I think it could ensure a faster paced gameplay for thos that want to redo levels or want to get all badges.