Thank you so much for that detailed feedback!
Tbh, we also wanted to do the second track line with different notes and this was supposed to make the game either harder or easier, depending on what mechanics we would add for the cassette, but unfortunately we didn't make it to the release, and we found out about the possibility of adding updates to the game just a couple of hours ago. Because of this, I just made a small update to the game, where I fixed the victory bug, and also added mini tutorials before the gameplay and credits in the menu. Something like that, and thank you for telling me about the day bug, i also discovered it earlier today, so yeah.