Fun map dude! Me and some friends have been playing it a ton and we fuckin luv it! The guns, generators, special zombies and perks are all awesome! A couple things though. We aren't very fond of the bazooka replacing one of your weapons when you try to do the easter egg, maybe just make it buyable off the way. Also I feel it's way too dark in the tunnels and the place where the elevator leads. The castle has only one spawn in it and is kinda uninteresting after the box is gone and everyone has Jugg. I feel that the g36,cm901, and ACR wall guns tend to feel the exact same and aren't any better than eachother or have more ammo or higher firerate. Finally there is no way to complete the map so It gets boring later game.
We really ignore these things in game though since the fun drowns them out, however if there is gonna be one thing you add I'd like it to be an ending (I know not everyone likes this feature but it just makes later game more fun and interesting instead of just a grind).