By the looks of it, it doesn't follow NES restrictions.
Throw him into the pit of pain.
It follows them just fine. Also that mock-up is fine as hell.
Can you highlight the two-by-two-blocks with three colour palettes? I can't see them. I am really bad at NES restrictions :l
What? Are you talking about the little arrow? Those could be chalked up to sprites since they're not worrying about raster lines. Also, it's 4 colours per bg palette, not 3, but black does to be one of those colours.EDIT:
My point is that it indeed follows them, although it doesn't follow them well.