Pure luck there. I always end with 6 balls or less when I reach final part.

It's impossible UNLESS YOU PAY. We should wait until developers fixes noticing of how abnormally impossible were levels 133 and 138.

Spend 14 gems to get 9 more balls IF you reached last group of balls. It's impossible because of very pure luck.

Pure luck.

For beginners:

Joy is for a massive group of separated bunch of balls including ice

Anger too including skill shots to break through thick ice groups. (Aim to the blue core to delete it)

Sadness is for a normal stage including cross line ones that has no skill shots.

This level changed because devs watched it and was easy.