Just a few basic questions to take some questions regarding the creation of level design stages. I have been reading the topic created by Sparks about Level Design, know the high routes, the routes that only specific characters go, anyway, I know the details you need for a good Level Design, the problem is as follows: how do I start? Every time I created a stage, I did anyway, without worrying about the beginning, middle and end, without respecting the physics engine, causing bugs and fleeing the theme of the stage.
Ex:
(very old examples):
Part 1:
Part 2:
Part 3:
I wonder how Level Designers games like Sonic Time Twisted, Sonic BTS / ATS and among others based on the classic create routes stage. Where do you begin? Create a sketch on paper? Create in the own engine? Anyway, details like these, and if yours have others too.