The first part of the game is really confusing. I still couldn't understand it fully, even if I got passed it. The second part is a bit easier but its difficult because there are no checkpoints and too fast. And the rest of the game were pretty easy and its nice to have some checkpoints.
I would recommend to make the first part to have the same look as the second part and maybe use the timer or use the filter. I can see how Much hints there are, but those are Very vague and I wouldn't recommend it. And it would be unfortunate for some player to not be able to see the rest of the amazing parts.
However, the songs in the game are a bit not synced, but very beautiful and the art too, they are very essential to the game.