The top of the windmill seems crowded. I think that this would be a better picture with the distractions at the bottom replaced with a bit of breathing room at the top.
The colors are great. You got a beautiful day to show off this windmill.
beautiful colors and subject. the only part i don't like is that the blades are so so close to the edge of the photo. sticking to rule of thirds would have made this dynamic.
I really love the windmill idea. The crop seems a bit too tight. I'd like to see more sky above the top of the blades. The composition is good and I love the sky and clouds.