The bottom left the last bit for me as well, I had the repeated part of the dance going back over itself instead of filling those final 3 squares - not kidding, it took about an hour for me to see it!
This is my first post. Hello everybody. I really enjoyed this puzzle and am chuffed that I have filled it all in. However I have no idea about the coloured squares. Hint please!
You've probably noticed each coloured group are anagrams - if you Google the solved anagram along with the title of the puzzle and 2022 you should get your answer.