I am the local idol rhythm game goblin (as I type I am surrounded by merch and figures from various idol games) so I feel I must weigh in!! I've played so. many. But my favs rn are Project Sekai and IM@S Starlight Stage! I post SO much about Enstars on my accounts, but as far as rhythm gaming goes... It's a lot better for cute boys than rhythm gameplay, it's kinda mid in that regard ;v; Proseka is best for rhythm games!! It feels so solid, I think that might be the good graphics, layout with the keys along the bottom, and comfortable timings! IM@S is unforgiving, and Enstars is too easy most the time. I actually did a dive into idol games a while back wondering what the best was and trying to give each a fair chance, and out of the contenders Proseka won. D4DJ was also up there, though! I had to delete it for storage on my phone, but it's my top choice for anyone who wants a fair, balanced challenge of a rhythm game! The various mechanics made it really unique but still fun! If you've played Sound Voltex it's much like that, but in touch screen form.