In studying this level, I need to have a "power ball" blast to trigger the part where the flowers drop down to the bottom level. I've had power blasts in several locations on the bottom of the top level but the flowers never fall to the next level. If I can get the flowers lined up, is the very middle location (top level, last row) the place I need to create the explosion? (Can't actually remember if I did have a blast from this particular location.)