Use more striped candy or play from bottom to shuffle them to move the Monklings to take them out from the board within 22 moves.
When you complete the level, is activated and will score you additional points.
Obviously if there were 50 moves I could also do it.
Don't seem to play Crush any more, just scroll back to lower levels to get sugar drops which get lost on the first try for the current level I'm playing.