The gameplay itself is fine, only gripe is that they dont differentiate 8th and 16th note symbols like most rhythm games do. Stamina is my main issue with the game. You have little to no stamina which is masked at the beginning by getting the Stamina bonuses from lvling up that dont go away. However this is short lived as you will be able to only play 3-4 songs on hard with your stamina at full as each song costs 9-15 energy. In addition the recharge time is very slow at 6 min per energy as of rank 28 so you are looking at 54-90 min wait to play another song.
Acidr31gn about Love Live!School idol festival, v3.1.1