Thanks to @silasoftrees for the wonderful job they did formatting the rules on the new speedrun categories.
These new categories are focused around doing late game things in SNAKE FARM.
Fang Greed is collecting 1,000 fangs without spending them. (My current PB is 8:01)
High Score is completed by finishing the game with 100,000 total points. (My PB is 9:07)
All Upgrades is the collection of all upgrades in the game. (9:43)
While these don't technically require entering endless mode, I had the idea for them based around using it.
SNAKELESS still needs a bit of tinkering before I have a solid idea on what it looks like.
Anyway, I wish fellow SNAKE FARM speedrunners luck on their runs. If you're interested in running the game yourself, or like doing endgame stuff in SNAKE FARM, then maybe this can be your chance to try things out!