O I just finished level 225 but not without a fight! I had to use 2 Green Magic to destroy gems of the same color next to chains, watch a video for 5 extra moves, watch 2 movies for extra magic powers, used 1Yellow Magic for extra movies. I ended up with 58,100 points and 3 stars. I did NOT enjoy this level...

Also look carefully that you can break 2-3 chains with one move. I just played it and finished with 3 stars on my first game since I got to level 225

Start breaking the chains from the top down. If your unable to break them then make a couple of bottoms moves to change the gems on the top.