Pretty good.
Though now that the climbing got removed (at least partially), sometimes i keep searching for the dang elevators or stairs.
Also, how do you climb the hanging ladders, they are just a death trap now. :P
Also, please please please please pretty please, remove the explosives.
In a gamemode like this rocket launchers and the such are not really what you need, like at all.
Only makes you make an accidental double kill, in which the double guy is mostly an innocent guy.
The compass thingy is clever but not everybody knows how it works.
The size becoming wider when you are closer should be relatively easy to figure out, but the color being the height isn't something that is really easy to figure out.
Of course you can refer them to the topic, but if there are any other ways to do this, please look at those ways, because it would be cool if that was somewhat easier to understand.
Last thing, while more people is also more fun, it makes it a bit crowded sometimes.
While it is useful to have enough spots in the server i think this gamemode either needs an other map that has some more breathing space (the alleys and walkways can easily feel crowded) or less people on the same time in the server.