Level 643 was the eighth level in Nocturnal Nuisance and the 296th jelly level in Dreamworld. To pass this level, you must clear 2 single and 28 double jelly squares in 10 moves or fewer.
When you complete the level, Sugar Crush is activated and will score you additional points.
Unlike its counterpart in Reality, there are three candy bombs in liquorice locks. And they only have five moves to explode, so the player must must destroy all the candy bombs until the moon struck on web version.