its still loading, be patient
If the music plays then it should be initialized in few seconds, if it still takes too long to load I suggest to play on PC otherwise even if you made it, the game will still cause heavy lag.
I'm sorry please wait further optimization but I cannot promise made it in next update. Since there are a lot of my portions atm.
August is huge update with huge new features. But I'm afraid it will not come with further optimization.