- "and I'm sitting here trying to make bigger and more difficult XD"
Hehe, no worries. For a one off game scene I think it would be problematic to have them more difficult. Maybe in a full game / after Jam version there could be different "Realms" where you increase difficulty.
- "because they are in a different scenes and when reloading the music start from the beginning that it. but need to thought of next time."
Jeah that's where you can use a singleton pattern. Quite useful for music.