How to make a multilevel game?

Question

Unity

I've been in game dev for half a year now and I can't understand how games with 100 or more levels are made. Here's how I did it.
I made a fully playable level with all the sound effects etc. And I kept copying this scene and rearranging it to another level, but that's the problem now I'm only 2 levels, and I've had small problems more than once, like moving the camera a little or changing the parameters player and I did it with two levels. But when I have, say, 30 levels, should I go into each scene and rearrange the camera? For me, this is a real problem, I don’t understand what to do next.

Answer 1

in order not to change the camera at each level, create a prefab from the camera and then throw this prefab to another level, at any level you rearrange the camera as needed, then in the transform component, if you changed the camera position, the position parameter will turn blue, right click click on it and there will be "apply to prefab", all cameras on all scenes will be in the same position

Answer 2

• Or do everything by hand.
  
• Or develop a level generator.
  

And yes, one will never make a cyberpunk, except perhaps in the year 7800.