The epicenter of your world is the spawn area where you see all the crazy shapes and you learn what you get into from seeing this first world.
The story I'm telling is the player comes into this crazy world and they don't know what is happening. Then a mysterious voice tells them that there is a super cool trophy at the end of the world, so the player embarks on a journey to get it
Crazy weird floating shapes
The design as I said is not exact, each area is a full open world, with different terrain and background. The map is just to save space and show only the areas you will actually be on.
Photoshop is much more complex then what I used to use (Google Drawings). Although for the collages it was really helpful to try and portray what my world is going to look like.