5/5 - Flappy Bird
The best thing about this game is it does very few things and does them so well.
The game give user many inputs and outputs. Btw, strategy and skill are both matters.
Little learning curve but very addictive.
I like the fact that Super Cell make itself new with another title in the same category. Boom Beach is far better than a Clash of Clans clone.
The game is a combination of Clash of Clans and Civilization at the first view. But I think the most importance point of their success is that a player can play for 30 second or 3 hours continuously at his will.
