Thanks !
It's not a worm, it's a caterpillar !
It's name is Patricia La Chenille !
(It's an inside joke from another game jam).
I've never heard of it, I might check it out. But this game is a game jam game, I don't really plan on working on it after the end of the game jam, so it might not be worth the effort (except if there is a "game jam" category in this competition).