They have changed the coin system. So editing my review. Now they make us watch ad for 12 secs before you can close it after every game. Because it's free, you have to watch it or close the app. It's quite irritating. I think 1 ad after 2-3 games is ok. But ad after every game is not so pleasing and makes you feel that you should uninstall app. the logic of the game is still not so pleasing. One person gets concurrent cards to finish the game and others are stuck at the first card sometimes.