Level 1520 is the fifteenth and last level in Lullaby Lake and the 715th jelly level.
To pass this level, you must clear 33 double jelly squares in 34 moves or fewer.
When you complete the level, Sugar Crush is activated and will score you additional points.
This was the fourth world finale level with six colours. The first three are levels 800, 1340 and 1475. If pre-nerfs are counted, this would be the sixth as Dreamworld levels 350 and 440 (with the exception of the third version) used to have six colours.
Most of the world finales have five colours, and levels 980, 1115, and 1205 have four.
This was also the only level in this episode to have six colours.
The above is no longer true today, as the level has been redesigned.