A puzzle game should be easy to understand but deep and challenging enough to be also difficult to put down.  Threes! is that game. Easy to catch how to play, but more you play, harder to clear a level. Threes! have won some important awards, such “Apple’s 2014 Game of the Year” or “IGF 2014 Excellence in Design Honorable Mention”.

 The game is available in IOS (2$) and Android (1$).
Check the Official webpage out.