Ok, good update. Probably wise to keep the 16:9 ratio.
The trees' stylization is interesting, but doesn't seem to match other elements.
You're doing an intentional low-poly lookin' thing with all 90's and 45's. You might relax the strictness your anglular lines a bit to match all the other more organically rendered stuff.
Consistent style can be tough sometimes.
Yep, as far as scale goes, one cool thing about keeping you player character size small is that you're now afforded the opportunity to give your levels a sense of grandeur, making them seem large and open.
If you get a working prototype or demo going, I'll be curious to see it in action.