In this game you click on a group of adjacent segments of the same colour to highlight them then you can click them again to collect the points for the group or click elsewhere to deselect them.
When you "pop" a highlighted section the segments around the game disc unwind round to fill the gap. The more you pop the higher your score gets.
When you clear one whole pie segment a segment will be added at the 11 o'clock position, this segment then winds round the empty segments until it hits a coloured segment and stops.
The game is over when you run out of groups of adjacent segments of the same colour to collect points on. There is a 4 level undo so that you can try various strategies and yes, the sounds are switchable.