Yeah, I made all the doors repeatable and only one of them actually turned out repeatable, and i did put some secret areas in it such as:
In the church i made it so that when you fire at one of the windows it opens and there is a hidden room with a LAZ device in it.
In The third level, There is a vent with a computer area map in it.
And in the second episode one of the storage crates has a false wall and that has a LAZ device in it.
So yeah, i did have some secret areas and,
Actually I've Been Making it like this:
The 1st Episode has short maps, only a little combat, and a short church level.
And I am working on the second episode, which has more combat, longer maps and, even my house made in chex quest.
As of now i am working on E2M2: Ralston Storage Facility.