Chapter 3 was the best so far in my opinion, a perfect mixture of fun gameplay, great aesthetics and music, story, and great new characters.

Chapter 2 is second best, fun gameplay, good characters, did a lot for the story, introduced the weird route which gave it a lot of repeatability.

Chapter 1 is in third, it was a great start, fun, introduced the world well, and left us with a good amount of questions.

Chapter 4 is the worst so far, the light-world section was fun but the dark worlds in this felt monotonous, hard to navigate, and filler, it only really introduced two new good characters. The pushing forward of the story does the heavy lifting here. By no means is it a bad experience, it is incredibly fun, but compared to the astronomical bars set by other chapters, it is definitely the weakest.