For over a year, the sprites in the Light Music Club Rhythm Minigame were just black silhouettes. Eventually, they were updated with actual artwork - but an entirely new set of sprites is in the works. I really love the art style of these new - they're so cute!!
I wouldn't like to spoil them all, but here's a sneak peek at just one of them, which is still a work-in-progress. It should give you an idea of the art style and level of quality to expect.
I hope you'll look forward to the rhythm minigame getting fantastic new art in the future!