Animation is very good, but some techniques you were using resulted in 215 individual colours, on a piece where we can see two yellows, ~5 purples, and a "white". Is there any way you could clean it at this state?
Take a look: https://www.linneart.com/pj/?input=https%3A%2F%2Fpixeljoint.com%2Fpixelart%2F158254.htm
All those 0,01% and 0,02% are just artifacts which shouldn't be there.