You have to get the really good fire glyph (cant remember off the top of my head its called) and attach it to both buttons and it destroys a heap of the blocks at once. Then you have to draw in the glyph before they all fall down again. Gotta have really good timing for it as well. (It's not the greatest glyph to get, it drops a little block down, I haven't quite figured out how to use it properly)