Heh...
Ok. The map is a "rounded-arena" multi-layered cavern, with lava at the bottom and on another room, and warpzones to make for some inter-catwalk connections.
Apart from the already mentioned warpzone problems (that plague any warpzone, no matter what UT map seemingly), i found the map amusing. Of course, i don't know if it would last for long, after all, it's an arena map...
The only things i can advise you to take a look (knowing that a map like this will never go beyond average), are:
1. The lava is still. Make it boilant.
2. The overall look is ok for a cavern, but feels too empty. You could work a few features at the cavern walls, as well as lighting, and some lighting effects like projections/shadows.
3. Too many super power-ups?
4. I've played the map with 6 players (me + 5 BOTs). This is one of those rare DM maps that actually got to my FragLimit = 51, inside the TimeLimit for DM = 15m, with Weapons Stay set to OFF. Carnage. Either re-think player number, or maybe the weapon and ammo placement, + the super items.
5. What's the idea of that end-room with the shock rifle and broken passage? Rocket jump?
For now, i think that's all.