OMG Teh feet...
The feet and the arms should be a little wider, just from side to side tho. That crotch protrusion doesn't need to be there, just the two legs meeting at a seam. Buu's pants aren't skin tight, and I don't think that Buu has.... organs like dat.
Looks suprisingly accurate though!
Wait... does Buu really have only 3 fingers????