Awful, to many self promotions and nothing works when its free, PLEASE FOR THE LOVE OF GOD STOP WITH THE ADS! I understand you have to have ads to keep the game running for free but to many ads and i dont want to buy it and the game tends to glitch for a second and it will speed back up and then you miss a note plz fix this and dont make excuses that its my phone, this has happend to me many times and i have a iphone 13 so its pretty new along with good wifi so the game really needs some fixing