In this level take as 2 or 3 Block Buster Boosters into the game, to free some single blocks in the end. You got 3 keys at the top when you start out the Level. There are 3 possible columns that can be used to crush blocks after you have lowered the screen. By using the middle key first you have all 3 possibilities left, so use that one to get rid of the first set of stone blocks. When you reach the metal block, use the spring in the same row to remove it, that way you still have the column rocket blaster left to help you with something else at the bottom.
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