The rules are very elementary: click on the coloured ball on the game field. Selected ball start leapping. Click free cell on the game field after that. If there is a track from the ball to the empty cell ball will be moved to this field. When you put 5 or more balls with similar colour in one line they will be removed and you will get score points. Every time when ball is moving and no line is removed 3 new balls will be located at the field.