I'm at my wit's end here and consulting videos to try to progress.
In this video the uploader collects girth powerups at the 1:48:21 and 2:36:13 marks and ends up with 18 girth. I've collected each of these and am only at 16 girth, and I'm at a complete loss as to how to progress. Are puzzles like the red button lock gate at the start of the blue area (3:03:53) possible with 16 girth? Is there another girth powerup that's currently accessible with some combination of walk/jump/eat/stick?
Any advice would be helpful.
https://imgur.com/a/ECxPyD9
Here's my current map.