Very nice build, even made it to my High Gravity collection! :)

Just some input of my personal taste.
I very much apreciate the color-coding - however, with the (different) colored walls and ceilings, it gets a little too much for my taste.
(the black-yellow stipes must stay! ;) )

I'd suggest, if you like, to make the lower 3 blocks of the wall as light gray, 4th darker, and the 5th (top wall block) even darker (maybe just black - ceiling dark grey/ --> lighter than top wall block).
Then make the light as a spotlight and play with the 'angle/degree'-thing as well as with the intensity.

Thanks for sharing!