I'd say map, but I hope it's not a dead end there.. oh well, the eye candy looks a bit interesting.

about 'Uber Marsh CTF' I like the background but the eye candy could definitely be better. About 'It's Darn Cold' 's layout: I don't really like it, it's big and platformy.

And what FS said about Phoenix' level is true. The base placement is almost the same, but I don't know if this level is symmetrical.