This map has a lot of nice features and details but there are some pretty major flaws as well.
* I am always pointing out how maps are too monotone and boring with color, but this map seems to have too much color. Perhaps a better way to put is that the colors are unfocused. For me, the map ended up feeling more like a Egyptian themed amusement park rather then an ancient structure being excavated. (As a first step, I would defiantly get rid of the green grass and I would redo those two horrible rooms with the red circle ceilings)
* The lighting is practically on fullbright and some shadows look like those from a night sporting event. The contrast of light and dark is what makes a map's lighting visually interesting. This map does not have enough dark areas, or enough shadows in general, and the shadows that are there often are cast in multiple directions. Try to take the ambient down from 90, make lights more proportional to their sources, create gaps in the lighting, and reduce the number of lights overall.
* Geometrically, there are a lot of details but in the finished map, the design sometimes felt discontinuous and poorly thought out. Even for arena style games, I think it is usually good to look at the map from a functional standpoint as a starting points, to ground the map in reality even if what you are creating is something impossible. (I would also get rid of the ability to go around on the exterior wall of the map which just ruins the illusion that there you are not actually playing in a box. )
3 stars for now