A dual stick shooter plus rhythm game. As with games such as Rez, your actions in the world (shooting, killing enemies, etc.) are reflected in the music the game is producing. Each level is a different song, with different sound effects, different enemy behaviours and different multiplier/chaining mechanisms. There’s a lot to explore and learn in a very familiar space. It’s also a good example of a game recognising and embracing the player as the author of the experience.