There are no glaring faults. It tiles decently well. It looks more like thick moss than grass to me, though. It's because you have so many globular highlights everywhere, packed so closely together. It looks very springy and mushy and thick, which is kind of cool, but not especially grass like.
I'd say more, but then I'd be spending more time on my critique than you did making it, which doesn't seem fair to me. Perhaps you would have found a better solution by yourself if you spent more time than the average smoke break making it? =P
Looking forward to the next update, though. Cheers! =)