Looks really good!

I agree that the blur and high color count isnt very kosher for pixel art, however I do like how it looks here! The drab grass and background look refreshing and realistic.

It looks like there's an automated blurry glow between the background and midground, bumping the colour count of this piece way up, and looking out of place with the otherwise tidy clusters. I think something more controlled, such as perhaps two layers of low-opacity single-colour fog, would be a better fit for both this piece, and the PJ gallery.