It says "This is the end of Chapter 3 and the current end of this demo. I advise you to save at this point if you haven't already. Thank you so much for playing!" and then their are links to the patreon and tumblr
That's very strange. It's been over half a year since that version of the game even existed. If you are downloading the game, the current file is called "MisplacedV6.2.zip", make sure that's the one you have. Have you tried playing in a browser? Also, are you trying to use an old safe file? If it's from before the release of chapter 4, it might just not work with the current version.