The dirt is lovely, but please use less saturated colors for the grass! Also, I recommend ramping your palettes towards a common shadow color; it would make it look more unified.
I like the details, but you should try using less contrast colors. You dont want to poke out the viewers eyes ;) But otherwise its pretty good. Just try to remember that the ground tile is not whats supposed to draw the viewers attention, so you can make it have less shades or less contrasted colors. Maybe make it a shade darker.
The grass tiles are pulling my retina out. Please try with something less saturate and less contrasted, I think it would be nicer :)
Trees and ground tiles look great !
Love the colors too.
Thanks for the constructive critisism, it really helps.
I think that dark blue makes a good color to ramp towards shading. I guess ill try that.