There are five(easy level) or six (difficult level) color balls in this game. When more than 5 balls with same color are in the same lines together, the user gets scores. If only 5 balls in a line together, you get 5 scores. If more than 5 balls with same color are in a line (horizontal or vertical or diagonal), then scores that you get will be much more. For example,
5 balls --> 5
6 balls --> 5 + (6-5)*2