Level 31 is the eleventh level in Lemonade Lake and the 14th jelly level. To pass this level, you must clear 28 single and 28 double jelly squares in 29 moves or fewer.
When you complete the level, Sugar Crush is activated and will score you additional points.
This level is a tutorial level demonstrating the effect of a colour bomb + colour bomb combination.
Since the first move is spent on the double colour bomb combination, there are 28 moves to clear all the jellies.
Some jellies are a little harder to clear at the angular vertices of both triangles, but they should not be to difficult to deal with, especially with only four colours present.