Marbly: free puzzle app game

Marbly comes from Andrey Novikov who made Tetris. The object is to move balls one at a time to create a row of 3 or more of the same color.

Each move must lead to a set of 3. You win when all the marbles have been eliminated.

I've solved all of the levels in volume 1. I think Marbly is quite good.