Thank you very much for the detailed feedback! Glad you enjoyed the game!
Yeah I definitely should've spent more time on the levels layout. It is kinda hard to get good procedurally generated maps with the doom engine since the scripting language is very limited and the level's sectors can't be created at run time. So the whole map layout has to be created first and then at run time sectors get randomly opened/closed. There is a neater way to do this with portals and prefab sectors but I didn't have time to look into that.
Thanks again for playing and for the feedback! I really appreciate it!