I can already say how much I like this game!
The way it presents itself is gorgeous! Very nice coloring, very clear to see everything going on!
I really like the different ways Melody (the character) moves for different speeds of the songs and how beautiful all of her different styles and clothings look!
It comes with 14 tracks, which honestly aren't bad at all! Not all of them, my style of music, but definitely nice to play on.

Personally I don't like downloading my music, I listen to everything online, so I would prefer it, if the game had more music on its own, or DLC to get more music into it, if you want it.

The different difficulty settings are nice, so everyone can play it the way they like it the most and having the different colors also show the directions of the buttons really helps in case you don't remember which button had which color, or if you do have some colorblindness going on aswell! It feels very polished to me and I hope that it'll one day come with more songs :D

Anyway, the game itself does a really great job at doing what it was made for! Definitely worth it!