Oh that one is supposed to be an antler! Though personally I think it's fine if you interpret any of the shapes however you like, coral could be cool... (and your saying it also looked like a stick reminded me I meant to put a leaf in here but forgot to. I will have to try to remember that whenever I update this next.)
I'll consider the idea of making a list of everything that's in here though! It would be a bit long and hard to maintain if I update it though. (I was vaguely considering putting the source code up somewhere, so the list would maintain itself in that case if it was just all the files, but I'm still kind of confused by software licenses so I haven't done that yet...)