Level 5666 is the sixth level in Pumpkin Parade and the 1837th jelly level. To pass this level, you must clear 63 double jelly squares in 26 moves or fewer.
When you complete the level, Sugar Crush is activated and will score you additional points.
Do not worry too much about the sugar keys, they will be collected as you play, either by the chocolate or your combos. The hardest things to clear are the blockers in the middle of the board so concentrate on these.