I agree, I think the levels are just going to look rather dull if we rely only on colours and shading without any textures. I think the texture you have on your blocks there is pretty good LSH, it's not too harsh and it doesn't interfere with the aesthetic of emerald hill in my view. Perhaps it could be improved, but I'm not yet sure how. Now the grass needs some sort of attention. EDIT: Also, I just had a look at the original sprites for emerald hill, there seems to be two layers of shadows casted by the grass above, the lower shadow being lighter than the above.