The liquorice swirls are separated from the main board, so special candies are needed to collect them. However, teleporters can teleport liquorice swirls into the main board, which means you don't need special candies to remove them.
You need to collect an average of 1.36 liquorice swirls every move.
The orders are worth 3,000 points. Hence, an additional 7,000 points is required to earn one star.