Hellwarlord

Also,don't be afraid to make ceiling higher and floors lower. Differences are good thing. 

ok thank you

Last thing before I'll do other things - don't forget draw door sector,for example 128x32 and inside that sector draw more lines on 128x16. It makes easier to control higher ceilings and door texture if you rise everything. I hope you get it. 

Jesus, dude, you make a whole chapter in the time it takes me to detail a single room

It takes me one week to decide were to put switch,two weeks where put decoration and 4 weeks if I should move linedef in left. 

It may look easy but its hard :)

Challenge accepted. :) 

I would put more colours here or even grab custom texture set. 

You should consider putting all the levels into one WAD file if you're planning on making a short episode from it. That and uploading it to /idgames/ after ironing all the errors and correcting stuff from feedback.