The music, especially the boss music, is top notch. You know why? Because they took Hollow Knight's soundtrack, to be specific False Knight. They probably took other game soundtrack too since some of them sound very similar. The UI is from P5, the gameplay is generic.
If you don't believe me, you can search Hollow Knight OST and heard it yourself.
I don't know whether they will chance it when the finish game come out, but so far, I don't really like this.