Haha, funny you would mention the hair and hat thing, I was just about to do that! And yes, im a Konjak fan, but I dont exactly see that much Konjak in this picture.

You're definitly a Konjak fan.

I'd recomend making his hair and hat bounce as his runs. Could consider some movement for his shirt too, since the design is relativley simple, it's always a good idea to somewhat compensate by making the animations more interesting (it's also the main reason why people will choose to go with a simple designs in the first place when it comes to a central character).

 nice