I like the geometric style of this too. The dithering seems good for the most part to me, since it's everywhere and part of the style.

The style reminds me of a youtube pixel artist, Luis Zuno. He does really nice painting style pixels, but a weakness of that technique is it uses a lot of lightening and darkening to shade the image, picking colors on the fly, and general lack of control over the color palette. The palette is created as you go instead of creating an image from a limited palette, which is what gives a lot of pixel art interesting colors and unified look.

While this style can create an image that looks really nice and can create large pieces in a relatively short time, you sacrifice control over your colors. I think this is why the colors seem to look "bland". To make up for this, go into the image after it is finished and rework the colors, and make a more unified, interesting palette by combining similar colors to lessen the color count, and adjusting the colors of the whole image.

I've always personally liked this style of pixel art though, and this is a really great piece. Good job on it and keep up the good work!

Nice geometrical style piece you have here! Though, in some places there is unneccessary dithering, and some colors are too bland imo. The part i like mostly is the top part with the dunes and sky. Keep going!