I hope that you can make out that the first rounds of single crochet stitches were worked in a rectangular shape. I did this so that it would sit flat, not wobble or tilt. Also, a Puffle body is not perfectly round.
For the hair I unearthed my old latch hook rug making skills. (I don't have the handy latch hook tool anymore but a simple crochet hook worked fine.) Here's the revealed hairline:
You could really just tie on the yarn pieces with simple overhand knots. (It looks like that's what I did in this photo anyway.) I'm thinking that I should trim the hair slightly shorter. It's a bit too flat'n'floppy.
And here's a close up of the face. Crazy cartoony looking features, huh? I'm proud of the satin stitching of the pupils.