Now that I’m maxed out in levels, I figure I’d share a method I’ve found to beat levels really fast. It involves the treasure hound event. First is the hard part, you have to beat 7 levels in a row. Use your boosters and coins if you have to because with this trick you don’t really need them anymore. Once you beat 7 levels in a row, you get the best chest which contains two rainbow blasts. Enter the level, and see if the rainbow blasts spawn next to each other. If they’re near each other, see if you can get them next to each other using the bombs the chest gives you too. If not, use the quit button to quit the level. If you haven’t used a move, it won’t ask you “are you sure you want to quit, you’ll lose a life?” and you’ll be taken to the garden again. You still have all your lives and chests, so start the level again and keep doing this until you get the rainbow blasts next to each other. Starting a level with a double rainbow blast explosion makes most levels trivial, this is very effective for grass, compasses, coconuts, what have you. Using this method I beat 200 levels in 2 days! Give it a try next time the treasure hound event rolls around.
P.S. Some levels are set up so that the rainbow blasts always start in the same spots. If this happens, use the two bombs booster, and the bombs will start where the rainbow blasts would be, forcing the rainbow blasts to go to other spots.