Daniel,
Something disturbed me when looking at your picture below:
a kind of haze on the colours ...
I took it on the PC and added some more contrast, with a slight darkening and ......
I think you have reached the summum of your art in painting a "flat" character as a three dimensions figurine !!!!!
This is the goal that I heard two years ago at Montrouge by someone in the public =
The perfect painting art and technique in painting a flat is :
If you place into two boxes of 150cm depth with identical lightening, on one side a three dimension figurine (a ronde-bosse) and on the other side a flat of the same subject, both painted with the same colours,
when you are unable to distinguish which of the two is a flat and which one is the ronde bosse !!!
I think with this painting, you have reached it perfectly !!!!