If you're going to make it impossible to earn coins can you at least get rid of the whole idea of hearts that you lose? The game gets impossible to enjoy when you can only play for 15 mins and then you have to wait almost 20 mins to play a level just to lose and wait again? You win 3 games in a row and only earn 10 coins but to use a redo option costs 20 coins? Of course ppl end up just losing and uninstalling. Plenty of other mahjong style games out there that are way less frustrating.