This level is currently nearly impossible to beat without boosters (or even with boosters). This is likely caused by a level buff, lack of moves, an objective which requires insane luck to fulfill, a level glitch, or a design error. This level is currently, or likely one of the hardest levels of the game.
Level 515 is the fifteenth and last level in Ice Cream Caves and the 166th jelly level. To pass this level, you must clear 52 double jelly squares in 24 moves or fewer.
When you complete the level, Sugar Crush is activated and will score you additional points.