I'll repeat one of my old "lollipop tree" -critiques for a similar case here:
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"
Have you tried to plot out what actually happens inside the foliage? If your tree were stripped of leaves, the size of the branches would be almost as big as the visible roots.

In reality the trunk part is a tiny section compared to the leaf section:

Doing realistic proportions might not be that handy in game graphics, but still, even when the trees are strongly stylised in games, the leaf section is considerably larger than the trunk. In the second pic from Link to the Past it's actually mostly roots, thr trunk is hardly visible at all.

"
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I like the ground tiles, nothing to whine about there.