Looks kind of cool, but the lighting is so blue that I think some players will have an advantage/disadvantage based on what team they're on. If you play in TDM mode, you won't be able to tell certain colors apart. Maybe keep the blue tone, but make it less saturated, and try to make some more interesting looking light sources.
I've uploaded it to the beta server and played it a bit. It's actually more fun than I expected, but almost impossible to identify colors.
The doorway details need clip brushes so you don't get hung up on them.