I agree with sgb3. If I had to say something positive about the current maps it would be that they sort of have that abandoned/empty mood, but then again, they also remind me of how inexperienced Source modders would just put random destroyed cars/rubble all over the place with no actual reason to justify it being there beyond "it's supposed to be post-apocalyptic!" So perhaps it's simply triggering that nostalgic feeling and coloring my persception of any actual mood.
I Also hate to say it, but the character art has a massive case of sameface, with only the ears/tails really differing the characters and their species (and even then, I can barely tell the intended species of some of them.) I'm gonna end my art critque here, because I feel like I come off like an asshole when I do, but I highly suggest the creator look into something like
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website. It's an incredibly useful tool for learning the different shapes of animal heads from different angles.
And yeah, look into some royality-free music, there's plenty of choice nowadays.