Level 516 is the first level in Sour Salon and the 225th jelly level. To pass this level, you must clear 37 single and 40 double jelly squares in 30 moves or fewer.
When you complete the level, Sugar Crush is activated and will score you additional points.
Focus on getting rid of the frosting and liquorice. Use wrapped candies to help clear the liquorice and striped/colour bomb to help clear the frosting. This level is very easy once you get the blockers out of the way.
You could also try using a colour bomb + colour bomb combination to clear all the liquorice as it will destroy them all at once.