The idea of this game came alone with the name 2/3 that best explains its essence: climb the leaderboards by filling 2/3 of the screen with color balls. Note that you'll be constantly disturbed to fill up 2/3 of the screen by a little red ball or simply bad ball. Also you'll have an opportunity to create a big color balls that we call filler balls or simply good balls. In order to move to the next level and gain the higher score you should pay close attention to two main indicators:
    > speed of the bad ball which increases at each level
    > size of the good balls that gives you score points.
    Thus the larger ball you will create, the larger number of score points you'll earn and the higher chances you'll have to fill up 2/3 of the screen and move to the next level in order to deal with another speed that requires better skills from the player. Once you start playing there's no stopping! Be careful or You should try