To play, click the middle sprite. Once you get a rarity, you can click the middle sprite again to reroll. It's just for fun. No, it doesn't skip the animation if you click the sprite again. And if you click again too early it might malfunction and not record the rarity you earned. It doesn't save. This was just a "for fun" project to pass my time in an after-school thing.
Music: Let's Go, Crimson Knight! and the other track are both by Hoyo-Mix. There are some cursed images if you are lucky enough to encounter them.