Had a go with this sawdust ... not easy considering it's only 41kb worth of image
All versions here seem to have a colour cast: Mark's has a yellow tinge, whilst yours has magnenta. Very difficult to correct that with such a small image file to work on, but I tried. What I did was mainly fiddley patching, e.g. cloned over the highlight on your tummy to try to flatten it for you
Cloned over highlight on your nose. Brightened the whites of your eyes. Cloned over highlight on your L shoulder to tone it down + also the highlight on your forehead. Levels adjustment. Colour balance (this is all over the place, but can't do much about it with such a small file size, the colours just posterize even more). Cloned over the posterized highlight on your L glove.
After I uploaded I saw that there are now shapes in the BG
but if you can ignore that ... well anyway, here's my pimp (still has a yellow cast but I gave up trying to fix it) :
