Bubbles in Line

Bubbles In Line is a 9×9 board game, played with bubbles of different colors, for Android devices. The player can move one bubble per turn to remove the bubbles by forming lines (horizontal, vertical or diagonal) of at least five balls of the same color.
To score move bubbles on the table to match five or more bubbles of the same color in a line.
Some bubbles have two colors, so they are counted as any of the two colors.
You can move the bubbles between any two squares only if there is a path of free squares.
Path is made of segments in vertical or horizontal direction (no diagonal).
Score:

For 5 bubbles in line you get 1 point
For 6 bubbles you get 2 points
For 7 bubbles you get 4 points
For 8 bubbles you get 8 points
For 9 bubbles you get 16 points
3 bubbles of random colors will be placed on random free squares after each move.
Every time you score, no new bubbles will be placed on the table.
Game ends where there are no free squares on the table.
Every time when you complete a game you can save teh respective game, have to provide a name.
We will store also info about the score, number of moves and the date when teh game was saved.

Undo: If by mistake you moved the bubble on wrong square you can undo only last move (two consecutive undo operations will not work).

The game has different levels of difficulty, depending by the number on the colors you selected when the game starts:

very easy – you selected minimum number of colors
hard – you selected maximum number of colors