I remember selecting "interpolation" on a rigidbody before to fix the jittery behavior for unity physics objects. Not certain if that will help, but hope it does.
https://docs.unity3d.com/ScriptReference/Rigidbody2D-interpolation.html
Viewing post in Spider in Doorija jam comments
The player character's head was the only thing I noticed that was jittery or perhaps blurry is a better word for it. Only happens when moving the character. The physics interpolation suggestion might be the wrong call. It could just be that the movement animation on the head is not aligned for a few frames, creating a stutter/blur effect. I'm just guessing though.