Reduce view movement
The developer FAQ points to Settings > Accessibility: turn off head bobbing and adjust camera smoothing. There is no official universal best value. Change one option at a time and compare a short movement path in the lobby.
When you only have a head
The developer recommends avoiding the Body Shredding Machine if its movement is uncomfortable, and asking teammates not to throw you into it. Becoming a rolling head is a consequence of selling the body.
Use the machine’s BUY mode to restore body parts. Camera settings do not regrow a body. A teammate can help carry a head or assist with recovery if you want to retain normal movement progression.
Noclip is another movement choice
An official short video responds to a complaint about rolling-head movement. The developer describes enabling dev mode in settings and toggling no clip, with a floating scene shown afterward. This is an alternative if you accept debug movement; the video does not show each settings click.
Compare the same short route after adjusting. Better handling is separate from completion or achievement eligibility, whose full effects were not established. This page explains game-camera options, not a medical diagnosis or treatment.