This is a clone of the original “Lines” (the original game was made by a
couple of Russian programmers more than a decade ago).

The concept of the game is akin to Tetris: You have a board with 9×9 squares.
Three colored balls are falling randomly on those squares, and it’s up to you
to arrange them in a line containing five of the same color. The line can be
either horizontal, vertical, or diagonal.