I still think the shadows on the mountains are too light. You've used 7 colours for the mountains but the brown/low sat brown ramp has 15 nicely spaced colours in it, some of which you are only using a few pixels elsewhere. Here's an edit (without altering the palette at all):
In the middle where the arrow is pointing, I've taken palette entries found in the yellow circles and used them to strengthen the mountain's shadows. In the circle on the left, you've used a grey in only 2 pixels! This is why I like mtPaint's palette feature because you can drag the entries around easily just by pressing shift, allowing you to optimise your colours easily. (There are also a few greens which are almost exactly the same by the way). If you slightly lower the saturation on the bridge's browns and alter their value so that they are spaced evenly within the main (15 colour) ramp, then they will look even better when you recycle them.
Also, where the '?' is, you've used a shade on one part of the mountain but not another.
