"A" is a very challenging game.It has infinite levels and after each level the tension rises and eventually increases your concentration.After each level the Colour of the game changes, testing your concentration.The aim is to pin the pin on the rotating disk which increases its speed after every level. And the major attraction is that the bgm of the game is so soothing and meditating..No annoying ads between the levels. also if you loose at any level you will be returned to LEVEL 1 !!!!!!!....So the Question is that "Can You Complete LEVEL 5?"...I believe you can ;-)