Thanks for letting me know. I might just make the game free with donations until the full build comes out.
For what it's worth, this seems like it makes the "free demo" feature for paid games kinda not worth it as a pre-release promotional tool. My plan was to use my demo as a way to gather interest before the release, and I can still do that, but it's unfortunate that using the "free demo" feature won't really work for that.