Ring the bell after five or more deaths on a level and press the Blue Button to enable Seb Mode. In Seb Mode, you won't take damage. You will still die from falls but this may be a nice option for anyone struggling.
patch 3 [Seb Mode]
Source: Steam Community (opens in a new tab)
Build and release context
Recorded Steam release date:
Within one calendar day of this post (UTC). The listed date does not establish an exact launch time.