Haven't made a level in awhile...
 

This isn't complete yet, just want to know if I'm on the right track. I wanted to try a couple of new things and maybe see if I have a knack for it. So yeah, it's not detailed yet, and I'm not sure where I'll go with some of these spaces. But anyway.

well.... umm...
o.o
the little stone walking path tiles are too evenly spaced out I think... try grouping a few together, and stuff, so it looks like an actual broken-up old path

the shadow off that tower thingy is cool... but I think the shadow should start lower on the posts, and the upper right part of the shadow looks strange.

I think those white walking tiles don't look too good outside... I see them more as inside tiles, and they stand out a bit too much for my likeing against the grass.

good start though, no tile errors that I can see

I've never seen the shadow thing done before, quite interesting. Though you need to change the placement, it looks a bit unnatural. It's good you avoided one of the big mistakes, that being detailing the level before getting the form down. I'm guessing you're making ruins of some kind, so maybe a little more debris. Another thing, is you have shadow on both sides of the cliff in the north. That's defying something, that's for sure. I'll rate it once you finish it up.