Moon struck will prevent candies matching both colours on the moon scale from spawning. If purple, orange or blue colour appears on any side of the moon scale, 6 additional candies have to be collected in addition to the 2 candies the player has to collect three moves after the moon struck.
Even if none of the required colours are on the moon scale, this level is pretty challenging with chocolate spawners and chocolate limiting the available space.
Watch out for the candy bomb. However, moon struck removes the candy bomb if it matches either colour on the moon scale.