You can download the Marbly on the App Store, and completely free. The essence of the game is quite simple — it is necessary to collect groups of one -color balls, which will remove them from the field. And the longer such a chain, the more points the player will eventually receive. At the moment, there are over 180 puzzles, three modes, built-in records of records, support for Game Center and even multiplayer.
Recall that in the portfolio of Alexei Pazhitnova, not only «Tetris», who brought him world fame, but also other popular puzzles, including Wild Snake and Hexic.