Currently looking into the issues with day 4. Thanks so much to the users who have let me know they had a problem with it, and a special thanks to The FluffeyPanda for the video.
While I'm at it, there are a couple of smaller issues I've spotted (not game breaking, but not intended) that I'll fix as well. As soon as everything's changed and tested (to make sure my changes don't break something else) I'll send out the update.
Thanks to everyone who has played the game, and to everyone who has let me know what they've found!