Oh, sorry, you're right! Useless comment.

I think the main point is about what ouroboRose said, and maybe that's why the last picture is the favorite one here (mine too). That gradient sky is gorgeous as it is, but the other elements in general, especially the trees, are too saturated. That fence contrasts in terms of style (it's much simpler in shading and number of colors), which makes it look very artificial. The same goes to the house/temple and the lamps (which also lack depth). The sand is too bright compared to the rocks, making them look like they're floating. Maybe you could at least shade that area to blend them.

Great work nonetheless. I really like the two last ones!

 I think the others mean that the colors feel too saturated, making the scenes feel unrealistic. However, I just looked at the website you linked and it seems like the colors fit with the rest of the site. Everything there is bright and saturated. So I think your colors work for their intended audience. 

The last panel is my favorite, and I also like the koi fish in the pond!

Instead of just saying that you don't like the colors, mind going into more details on how I can improve? Just saying you don't like the colors doesn't help me at all. What is it you don't like about it?

I was going to say the same.... I like the general rendering and the simplistic look, but the colors just don't fit!

 I really enjoyed the work, just did not like the colors

 I really love the last one in the second row. I'm not a big fan of the colours used for the trees though.