As there are only 50 moves, you need to collect an average of 0.8 striped candies per move. So, try to find matches that will give you striped candies. If you are lucky enough, mix colour bombs with striped candies. This helps a lot in passing this level, as it will create striped candies of a specific color. Try to repeat that until beating the level. The mystery bags can help you and make the level easier.