To me, it's just cubes with plates on them, and a load of duplicated trees. :/
I'm not saying it looks bad, and it isn't, but it's really basic. I see an area in the first picture where the grass is sort of fraying, and you're going somewhere with that. I understand that having loads and loads of different trees would be very difficult, but maybe a few different kinds would spice it up. It just needs something different, something new...
All in all though, it looks good, hope you get in.
