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This is a very difficult level, and relies a lot on getting the correct blocks when and where you need them!
I have completed it without boosters or extra moves, but if you have them, boosters can help to create enough of the correct color blocks (paint) or destroying unwanted blocks (rockets/line blasters)
My first concern was to remove the two electric blocks and stop all that mesh making!
Then I worked my way down the board, trying to save any blue blocks at the same time as finding enough blocks to fill one of the butterflies (and rescue one Pet)
Once the second blue butterfly showed, I then removed a big group of blue blocks to fill two butterflies and save the remaining two Pets.