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 6303 is the thirteenth level in Marshmallow Mansion and the 1448th mixed mode level (529th jelly-order). To pass this level, you must clear 45 double jelly squares, collect 9 liquorice swirls and 48 toffee swirl layers in 21 moves or fewer.
When you complete the level, Sugar Crush is activated and will score you additional points.