I'm all a fan of desaturated pieces, but I think there's a line you have to draw with that. This is so desaturated that it's hurting the contrast, and things just look smeared to me. The cliff walls don't stand out enough, especially, and everything just looks really bleached.
I messed around with the colours a little, they're still far from vibrant colours, but I personally think it helps break things apart.
[edit] by the way, the rock monster seems a bit out of perspective, sharply out, I think it's mainly because of his pose furthers this. Also, I'm not really feeling the decoration on the gui, it seems to have a negative effect with the text, probably because the colours are so close together between the little dots and the font.