What did you use to draw this? I'm kind of stuck on what to say, I'll prolly figure something out. But just a note, if there is shading and such on everything else, doing some shading marks on the ceiling to show the perspective may help a bit.
I agree , the ceiling could be considered plain if it does not suggest a artistic theme or symbolism to you.
There is part 2.
AKA "The drive"
Wow, these are awesome. Very experimental. I love the second one.