On level 63 after you complete the intial click and drag thru the first chamber
and the purple mist stops at the blockage. Check the MAP. If you haven't reached 
the white square outline with the mist. Go to the menu and restart the level 
again. Continueing the game to clear the second chamber is a waste of time. 
And frustrating. If you have reached the white outline you will have a much better
shot at making it to the end. I found that if you can line up pieces in large 
quantity you can blow the whole field apart.