I'm not sure I know what you mean... can you give me a specific example? Like when saws are supposed to be sticking out of the ground, but they aren't covered in fore layer by ground? Is that what you're saying?
Those screens you posted look really good.
I think Nova meant that you should put some decorations on them to attach them to the land. I wouldn't worry about placing saws in the fore tiles as long as they are nicely decorated and somehow linked to the active tile. Levels tend to look a bit unfinished if the hazards just float around. Putting smaller saws in the center of the original ones gives them a bit more depth too, so I guess it could be a good thing to experiment a bit to make them look more interesting.