This game already has 6.7 million users, makes $600,000 per day, and in top grossing rank above Electronic Arts (which have 800+ apps in the AppStore).
Candy Crush Saga is no longer a stranger, and I predict it can be submitted to the dictionary under the word "addiction", "obsession" and "fanatic". It is phenomenal that it has taken the world by it's no-brainer requirement to play it (match of 3). It is just a step higher than Bejewelled with some fancier power ups and game play.
Requirements: have lots of Facebook friends who are still playing this, and in no time get to level 158, which is where I'm at currently (no, I didn't spend a penny yet). You need friends to get tickets and hearts, or you can join the statistic, that averagely a user spend $3 a day to play Candy Crush.
Pro: a great time waster game, while waiting for someone at the cafe or attending a lecture that is not interesting.
Con: Why is Lisa not giving me a heart when I just whatsapp her?!? Argh..