I'm not sure how you handled the placement of trees and grass, but it's a little off to me. I can see grass and trees floating above the terrain, which as a potential new player, that would be unappealing and probably an indication for the rest of the experience I would have playing. There is also a bunch of clipping that could be fixed too.
You want something eye-popping and alluring to grab the viewer's attention. Albeit you do have bright colors that would grab someone's attention, but taking a second glance brings out the flaws that the bright colors just can't fix nor hide. Some of the screenshots make the world feel empty too.
You can also see some trees have some kind of texture of what looks like grass on it, while the other trees are not textured in such a way. This looks/feels inconsistent and should flow nicely together, in which this doesn't. I would remove the textures from the trees that have them or adjust the other trees to match the aesthetic style that you have chosen.