Thanks for the kind words guys.
@sparksterz - No, there was no source image, just kinda made it up as I went, I started with the tree and just kept adding stuff around it until it became an entire landscape. This pic took ages and to be honest I almost gave up on it at several points during the course of it's creation because it seemed to be taking too long and it wasn't coming out the way I wanted, but I just kept at it and continued to pixel away until it started to resemble something I was sufficiently happy with.
@NeoGeoNinja and pulstar - Oh, believe me I'd love to animate it, that's one of the first things I thought about as soon as I finished the pic, but that will be a lot of work, animation is very labor intense and I don't know if I have the patience for that but I'd love to. Also, I do plan on attempting some character designs in the future.
One thing I will say is that it was a great learning experience and I feel more confident going into my next pic which is in the works.