I got two, albeit similar ideas that could give the game some rooms/sections that feel more like a vanilla shmup (as I described
here the game feels a bit lacking to me in the shmup department - at least from what I expected).
The Gauntlet and the Hallway.The first one I envision much like a (section of a) regular stage in say, Jamestown.
A very long room potentially with auto-scrolling (if that is an option to introduce for individual rooms) and waves of incoming enemies moving in formations from one side as well as, potentially, some free-roaming enemies (like we have now). These could represent the passages from one section of the mother ship to another and/or the "elevator shafts" between floors.
The second one is similar, only more narrow and crowded and mainly populated but turrets and traps, forcing the player to make his way, dodgeing stuff, though the hallway. Think of it as the approach to the death star, only in the hallways of a mystery scifi castle
. Come to think of it, this type could be used to model the
approach to the mothership in the first place!
Both room types would really enrich the game's variety in my book as well as introduce some classic shmup love, which can never hurt right
?