The objective of level 191 is to clear all of the jelly and score 170,000 points. You have 50 moves to do it. The catch is there is jelly on every square, including under the three-hit blockers, so this level is tricky. The way to do it is to get through the blockers as soon as possible. While you are doing that you will need to keep your eye on the 25-move bombs at the bottom of the grid, but if you get through the blockers okay you will be able to take care of those. Unsurprisingly the key to completing this level is striped candies and combos. You will never get through it just by matching rows of three. You have enough moves to complete the level, just make sure that each one counts.