The art test itself said this: "Feel free to add your own interpretation to the style, cleanliness, and add any extra supporting elements as needed." But how far should I go? When they give you the green light for creative freedom, how big of changes am I allowed to make? That's something I'm still not entirely sure about.
I'm not too sure what the outline for the art test is... But... Why are you side tracking from the concept art? The changes you've done to your version makes it look completely different than the original. Without the blue tones from the concept art (brick and roof), I feel like your model (being heavily warm) looks like…