The objective in level 159 is simple: score 20,000 points in 90 seconds. You also have plenty of space to work with on the grid and the spinners that are present do not pose much of a problem. The issue is the chocolate as it needs defended against. There are four chocolate makers in the very top row. If you do not keep it under control it can block the candies from falling. This almost happened in the video at 54 seconds. Striped candies and colour bombs will help with the chocolate and there should be enough time to accumulate the points if you work moderately quickly.