Puzzle & Dragons.
It's not your usual Candy Crush styled game, since it lets you move the orb you want through the whole board. It's got a lot of different playstyles, some leaders will make you do as many combos as possible, others will ask you for specific color matches, others may deal the most damage when a full row of the same color is matched, and so on.
It's got gorgeous designs, and since it's pretty darn popular in Japan, it does a lot of collaborations with different series (DB, HxH, HnK, Evangelion and many others, even DC comics)
GO GET IT. NOW.