On level 61 you can find a very useful pre-set match: 4 green pieces in the left part of the field will give you a firecracker to destroy the crates blocking the portals. It’s the most effective way to start the game as falling pieces will start to create automatic matches, and as a result they clear out some of the golden tiles for you.
After that you should focus on making matches on the right side of the field – the pieces on the left side will continue to slide and destroy tiles for you through automatic matches. It will save a lot of moves and make winning the level a much easier task!
If you run out of matches in the right part of the field, try making bombs on the left side. If you play through it right, they will get you more matches or at least charge up a Lightning power-up.