Color Lines was originally a DOS game in 1992, programmed by Olga Demina,
with graphics by Igor Ivkin and Gennady Denisov, published by Gamos.
It is one of the three game concepts that originalted from Russia,
better known than Filler though of course far less popular than Tetris.
The following description is taken from the defunct Gamos website:
The game field is a square divided into 9×9 cells
on which balls of different colors appear every once in a while.
Your goal is to reach the maximum score and to capture the Main
prizethe Golden Crown of the Champion. Points are given every
time you manage to remove some balls from the field. Only horizontal,
vertical and diagonal lines consisting of 5 and more balls of the
same color can be removed from the game field. You can create such
lines by moving the balls around the field. A ball can move along
vertical and horizontal (but not diagonal!) lines if no other balls
stay between its initial and destination cells. Jumps over other
balls are not allowed. In one move you can transfer only one ball
regardless to the length of its path. After your turn, three more
balls are dropped onto the field (their colors and location are
random). Thus, every next move is going to be more and more difficult
for you! But if the result of your move has made a line disappear,
the next portion of balls will not appear immediately.
Color Lines is not a game that can be won, sooner or later the field
will fill and no more moves will be possible. The goal is simply to
achieve a high score.