You may be familiar with ryhtm games as Dancing Line, Geometry Dash, or even Guitar Hero. They have something in common : every single action in the game is synchronized with the music. My purpose is to make a game like Geometry Dash where the player has to do some actions in rythm while the character scrolls automatically in the level. I have a few questions about this type of game :

• Do I have to keep my FPS constant as it has to be always synchronized with the music ?
• How can I build my levels with a music in mind to make sure that it will be synchronized ?

I am working on Unity using C#.