I know there must be a lot of comments and feedback to consider, but I feel it is EXTREMELY urgent to get across, as someone that really really really REALLY likes and appreciates this project, that the introduction to this game for a new player is GOD AWFUL.
The fact there's no mention of Remixing and how Expression works, so one third of the scoring system that is entirely just not mentioned to the player is completely unacceptable. It is a CORE MECHANIC, you can't describe the game as "press the buttons in time" and have them find out there's a whole third of the game they're doing wrong. Even a person that plays rhythm games is completely hopeless to actually understand why they get a D rank on the very first stage after hitting every note correctly if they happen not to know about freestyling in Parappa. It's an entirely broken onboarding, they CAN'T figure it out.
That's before even mentioning that completely honestly, the first song is EXTREMELY DIFFICULT for the very first moment of gameplay a player gets. This is not a skill issue, think SINCERELY of a player that has never player a game like this, and now think of what the first song of this game is like. There's a good reason Parappa starts with just verses of one button. Playing these sequences is REALLY HARD ACTUALLY. As it stands, this game doesn't seem to have a difficulty curve at all which is REALLY BAD ACTUALLY.
It is tremendously disappointing to see this after waiting this long for a demo.