Hello there! You're correct, the demo is not up to date, and is about nine months old, if I remember well. Considering how much the game changes every other month, it'd just get extra confusing after releasing the 6th, 8th, 10th version of the first few areas. Nevertheless, the current version of the demo is getting a bit obsolete, so I may need to post a new version sometime in February.
Thank you for your support and please let me know if you have any more questions.