Imagine a simple rectangular box with a jump pad and you will have a right description of the map. I mean that "Coliseum" refers to the few pillars spread around the area more than the postcard sent by one of your office mate last year. Just kidding ;-)
To be honest, everything in this map reminds me my first steps with GTKRadiant and much more work and beta testing might improve this release (take a look at the the texture of the jump pad or at the layout of a pillar to understand what I mean). For example, gameplay can be better with some areas near the ceiling of the box for some hide and seek fights and it's easy to add two or more spawn points in the map to make the action less predictive, etc.
Needless to say, due to the small size of the map, the action is really furious but not very exciting for me: take a RL then do trampoline with the Quad and your buddies will appreciate a lot of spawn n' die rounds!! Bots are supported.
A good point for the small size of the download but I can't recommend this map without improvement. Skip it.
Reviewed by Xzuhl.