It would be awesome if there was an option to return to the world map, in an already completed level, just like in SMW and NSMBDS. But if the level is not completed yet, the option won't be available.
Here's an example of what it would look like :
- When the level wasn't finished yet :
After you completed the level :
It should also be an option on the World Map Settings, so the player can activate it if he/she wants it for his/her project. Here's how it would like :
This will be really helpful if 38A add this.
With this option, you shouldn't even have to complete the whole level again if you forgot to collect a star coin or something else.