Hmmm. To be very honest, Tik, that tileset looks like it has potential, but there's something missing in it to make it awesome... I'm not sure what it is, and I guess it still misses eye-candy stuff, but I'd suggest for one to make things.. smoother. The grass looks a little as if it was a low-quality jpg, and I'd suggest making the gradient smoother between the two sides of the wall of ground in the upper right ( kind of hard to describe ). The way it is now, it looks like something was broken out of the ground or so.
The way it is now, the tileset looks to me like.. any other foresty tileset except with some grainy textures added in.
With the grainyness comes some sort of natural feeling and the atmosphere of old movies and such. It has charme, but it lacks something...

I hope that helps any...