The player is required to score at least 700 points per second (35,000 points / 50 seconds = 700 points per second).
There is a lot of icing on the board, and there may not be enough time to remove it all, unless enough cascades are triggered.
The board also has a slightly awkward shape.
Five colors makes it easier to create special candies and trigger cascades.
Strategy[]
Start by removing the regular icing and moving your way down the board, clearing each denser layer as you go. Once sufficient board space has been opened, begin creating and combining special candies to reach the target score.