This game is very popular in eastern Europe and especially Russia. Move the objects (fruits/blocks/gems) to build horizontal, vertical or diagonal lines of 5 or more of the same color and they disappear. You can only move the object to its destination when there is a path available. Select/Deselect with [S]/[D]. Though easy in the beginning it gets very challenging in the hard level. Experienced players reach scores above 1000 points there. Beat that!
You may configure the controls at anytime, by default they are: Start/Pause => [Enter] Move => [ArrowKeys] Select => [S] Deselect => [D]
A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.