Could you please confirm whether you launched the game without extracting the ZIP file, or if you extracted the files before launching it? Running the game directly from the ZIP archive without extracting it can lead to corrupted save files
I'm not entirely sure, but it's possible that your save files were corrupted. That could be why, when you tried to move on, you were sent back to the first day instead of progressing to the next one, as the game still considered you to be on day one
