Yeah... I think the square tiles have the noise filter on them.

So, you didn't really make the square tiles yourself??

Yes, It is true, the barrel perspective is a bit wrong.

And the two square tiles was a weird fail, but the others I really made by hand.

Thanks for the comments^^

I don't believe you hand pixeled the two tiles, together they have 71 colours; but the rest of this image contains just 14 colours. It seems as though you've used some kind of noise filter.

I like the sign's style, but you have some conflicting perspectives there. The barrels are seen from much higher up than the rest and I think the tree looks a bit off too, though i cant put my finger on it as well as the barrels.