1 star: 10000 points
2 stars: 110000 points
3 stars: 130000 points
Your goal is to mix 7 sets of striped candies and there are 4 striped candies on the board already, but they are in the far corners and you need to make room to make matches. Now remember once you set off the cannons, it clears ALL the pieces on the board, but you really have to at least remove 2 of them to make enough matches to work with. Bear in mind where you mix the striped candies, because if you plan poorly, it will set off one of the cannons and clear all the candy on the board. And yea, the ever present cyclone will make life just that much more difficult to plan.
No need to get upset if you can’t beat Candy Crush Level 421! You just need to relax and watch this:
Patricia Frederick’s Tips for Candy Crush Level 421
If you can manage to leave the frozen striped candies in the corners frozen when the first cannon clears, they will drop to the bottom corners when the board clears for you to collect.