Hi OG.
Cool stage, but I think the floor could be improved. I've made a very quick test, take a look:
This could be improved even further. To fix it, I've used Photoshop Hue/Saturation with the values: -23,0 -30
Another tip: I think you can add a black overlay, with a very light transparency. This will darken the characters a tad, since the scene is dark but the characters are too bright.