Sharon Daniela pretty good screen, the main problem is not just the amount of brown in this image, but how much the same three shades are used, might not sound like a big deal, but when i do this to the three shades:

it becomes very obvious how few colours there are, thats really the main thing that needs fixing, that and the cliff tiles.
they're pillow shaded and tile pretty badly, that is to say repetitively. I know a lot of quests use a variety of cliff tiles to mix it up and try to keep down the repetition, but really it just breaks up any consistency.. I know there are some good cliff sets made, and lots of official tiles ripped that do a good job, don't worry about using the same cliffs as other quests or official games, if there are better tiles out there, use them, so what if lots of quests do, they should.
back to the colours, some good ways to combat this problem would simply just to put in some more colours, the brick tiles in the sand for example, they could be any colour you want really, just as long as they fit in with the saturation, the walls also could be another colour, or perhaps make some nice decals for the walls, would make the area more diverse and interesting.
and the pots, I wish I could say something good about them, but I just can't, like I said about the cliff tiles, there's no point in reinventing the wheel if its already perfected, just use the pots from lttp, LA etc, they're perfect.
all that said, its a very nice area and got my vote
Zemiousan admirable imitation given the ZC limits, however a few things bug me:
the sign is from yoshis island (I cant remember for sure)
the mario sprite is from SMB3
and the majority of the tiles are from SMW
all I'd suggest is picking one game's style and sticking to it, personally Ive always though SMW was one of the ugliest and most overrated games ever, but your screen would still look better if it's style was consistant.
Beta Linktheres some bizarre saturation and contrast issues in this screen, take the cliff tiles closest to the center of the screen for example.
the two brown shades are very similar, both pretty close to a 50% shade, then solid black lines and dots. It doesn't make sense and would look better with another shade of brown inplace of the black, or to adjust the highlights on the cliffs in relation to the contrast between the dark brown and the plain black, illustrated below:

basically, all the colours in this screen are so similar in shade that the amount of black looks out of place, you need to take more risks with contrast, it will make your screen look a lot better