I started drawing a map of the direct paths for myself for the archievement and thought, eh, may be of use for someone.
It may be a bit confusing at times, but I hope it's of any value for anyone.

It is based off of the map provided by Demajen, see the Steam Guide over at https://steamproxy.net/sharedfiles/filedetails/?id=2111608787
Besides the Lobster girl icons as a warning if you want the "don't startle the lobster girl" achievement, nothing about the map itself is from me, just the paths. You can tell by the difference in quality ;)

Every part starts where the previous ended, whenever a warp happens, the color of the arrow shows you where it continues.
Beware, all collectibles are completely ignored.

If following red, go to next image, if following turquoise, go to last image


If following pink, go to next image, if following orange, go to previous image


As this one was all over the map, it gets a bit confusing. Here is all in one image with irrelevant map parts removed:

(Back to the previous image)