I have been working on this game since 2017, and this time I have a new category to take a shot:
https://tasvideos.org/UserFiles/Info/638735950496173474
Yeah beating this game without taking damage and not using any subweapons, but I still allow killing enemies and upgrading the whip.
This WIP doesn't include scroll glitch yet, because I wanted to test optimizing this game without them. This is the first step for now.
Back from 2010, scrimpeh made a TAS of this category, but that run was rejected at the time, years have passed and new tricks were discovered over the years.
Current progress: 31 seconds faster, no scroll glitches (as I said above), spent arount 50% rerecords adding extra entertainment, and I'm not sure if upgrading the whip twice would save more time (it will be tested before going to the major second step).
EDIT: This game uses US PRG1 version, because I imported the old run from FCEUX to BizHawk.