Failing the 1906 Level for the Sixth Time

This level requires you to clear 48 cans and 18 sturdy-looking steel plates. As you might expect, the cans disappear only when matched with animals of the same color lol But how do you get rid of the steel plates? They can only be cleared with horizontal missile or pinwheel power-ups, as shown in the second image ㅠ There are so few animals on the board that I keep seeing them get rearranged because there aren't enough blocks to move ㅠ I'll keep trying and post an update once I beat it!!