Roll the bubbles

This game is similar to famous "Bubbles" or "Dots". Be that as it may, it is an exciting puzzle game that will not leave you indifferent. The rules are simple: 1) Tap the center of four balls, to rotate them clockwise. 2) You get points and extra moves when you form 2x2 square of four matching balls. Joker-Ball substitutes for any other. 3) You have 10 moves initially. The game will end when you have no moves. Game Features: 2 game modes: 1) Timed - with a limited time; 2) Infinite - without any restrictions. You can choose the size of the field: 5x5, 7x7, 10x10. There are modes with Super-ball and without it. The game has an undo move button. Save/Load game state.