I was wondering that will there be custom backgrounds like you can select the backgrounds or put your own like a png so yeah i don't know will it get added?

For the custom menu music when you start the game where you can change it or put it your own like a mp3 and no is not for the game is for the menus so yeah i don't know will it get added?

No guarantee, but I can consider this for a future update and put it on my to-do list