Some new creatures for the game! These ones are based loosely on a sci-fi short story I read ages ago that I can no longer find/remember the name of. I'm calling them cloaks! Getting enveloped by one will slow you down and make it harder to jump, but you can knock them off of you through various means.
EDIT: the story in question is How Beautiful with Banners by James Blish. It's an okay story, but the "cloaks" in it are the element that really stuck with me. May change the name of these creatures to better differentiate them from Blish's work, but we'll see!