you take rougelike, and you make it harder
turns change with the rhytm of the music. If you don't press in time you loss turn or your turn is after monsters.
monsters have patterns, how they move, you can say that monster are dancing.
It's really funny at the begining, where are few monsters. You learn patterns, you angry at yourself, that you are deaf, and you miss rhytm. You jump arround to see how monster dance.
Game later is even funnier, you just don't have enough time to think how monster will move, which will attack you in few turns.
You explore and have grea time
You see how you progress with each run of the game. You die, and you play again and again, and again, and you just lost few hours, and you don't know when.
Thankfully, my exams save me from this dark, funny path
And soundtrack is amazing