Fans of puzzles obviously will not remain indifferent to this game. You should not look at superficial simplicity, after all the further you pass the game, the more difficult and more interesting it becomes. The free supplement includes thousands of various levels with different complexity and a set of options of passing. Variability is a bargaining chip of this puzzle.
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In order to pass the levels it is required to connect one point to other point of the same color. Multi-colored streams formed thus shouldnt be crossed anywhere. The very first levels rather simple and it is possible to pass them purely intuitively. But here further obviously it is necessary to think over.