Call it Mahjong, but it's really about matching pairs

From the start screen, there are no choices. You have to look at what's placed below and use your brain, which is a real headache. When a stage ends, they force you to watch an ad. If there's absolutely no answer during a stage, when you feel frustrated, you can watch an ad to get an item as a reward. If possible, I recommend the 'shuffle randomly' item, which is the first one. When you use a hint and there are no choices, it says there are no choices. And then one hint item disappears... Still, it's more fun than I thought. People who like puzzles might find themselves completely hooked before they know it.. If it weren't for those ads, I wouldn't even notice time passing, haha