It’s very polished, the tweets are really in sync with the music and the different pitches for each note/key helps “feeling” the patterns and playing more with audio and less with visuals.
I also like the changes of expression, and how the hype gauge influences the foreground.
Sometimes, the last note appears at the same time as the first one starts showing stars so it’s hard to keep track, but adding sound or looking at the last note from the corner of the eye, it was okay.
The difficulty curve was irregular though: it starts very easy for a while, then intermediate for a very long time (where I started wondering if the game had an end), then it suddenly becomes very hard, for the few patterns left. Hard both because there are many notes, and they are placed closer to every other on screen, making the order in which we must press them less obvious. Eventually I lost almost all my hype at once, whereas it was full the rest of the time.
It wouldn’t be that much of an issue if you could wrap to any song section in some kind of training mode, but since you have to restart from the beginning, I didn’t have the courage to go through the easy-medium section again just to try to do better at the hard section. If you could either warp, or the difficulty was steadily progressive, I wouldn’t mind replaying a few more times.