Along the cliffs I think you are missing the dirt-tile. Also, some discoloration around the left side of one of the cliffs takes away from the value because it stands out and doesn't blend. There is another set of tiles for that particular piece.
Hmm, about me rating a level .1; I did that once (mabey twice
) when I gave some tips for a level someone posted, and had a bunch of half-grass tiles. These new tiles only work as a half against a wall, or something solid and doesn't move, as Shadowless said previously. Also, I don't like to rate levels, so that was just another way to express how much I dislike bad use of them.
(Golly we need a new tileset)