That does look very nice! Excellent work.
Some people don't accept that gradients like that can be called "pixel art", so for example, you wouldn't be able to put it up on Pixel Joint. But on the other hand, if it looks good, it looks good.
Initially, I felt that the upper clouds on the right didn't have the right highlights to match the ones on the left, but then I noticed more sunlight/gradient on the left. So I assume this is where the sun is. It's subtle though, and in my mind, it's confused by the highlights on top of the clouds on the lower right.
But that's really nit-picking. This is a great piece imo.
