You're right, and I'm not sure why it's doing that (Google returns "Unknown error", very unhelpful) other than blaming my connection when uploading the game again. That or google's default zipper has failed me. I'll make sure I don't have either of these things happening when I release the next update, which should happen in about 5 minutes.
Edit from 5 minutes later: Have confirmed that this does not happen before I upload the file to itch, so it's an itch io problem I don't really know how to deal with. I'll try uploading to a third party link while I try to figure that one out.