Here’s a video of my level: Crypt Raider game from the @GameDev.tv course - YouTube
I had a bit of trouble using DirectionalLight so I opted not to use it. I did go for a longer hallway, lots of cages in the main room, and a darker blue light in the crypt section. I also enjoyed decorating the mausoleum with lots of lights, candles, and coffins. Overall I think it looks pretty good.