Fantastic work Terje and it's almost finished I'd say...
There's just one thing I notice which possibly may need a little love and that's the light creeping out of the cabin and the lighting of the roof...
It looks like the door is translucent as there are some bright patches (because of translucency somehow or a texturing effect?) and a similar effect is visible on the roof as if it has shadows cast on it.
Since the lighting on the distant mountain is so soft I cannot really tell the direction of the sunlight, so perhaps there are shadows of trees on the cabin roof?
Regarding colours...
I might be wrong, but as far as I know smartphones are anything but reliable to judge colour on.
Basically all phones have uncalibrated screens and more importantly: the screens themselves do not use sRGB, but often have their own colour space.
The browsers do support sRGB of course, otherwise at least 90% of the internet is unusable on it, but the screens can have a completely different colour space or otherwise a colourspace attuned for more vibrant fancy images on the shiny reflective screens.