PLEASE FIX LAGS/SLOW DOWNS. The game is awesome. However, it feels like devs think players are only bank account. Ton of the content is available only with spending real cash. Less than a month playing, already spent around 30$. For a game I can't play whenever I want. Free songs are long to unlock. And those costing gems are really costy. Devs don't reply to players on Facebook. Game has been lagging a lot for me, which means I cannot reach higher scores...