I spent few days on this and still have some serious problems, mostly with perspective. I'd love to see some advices and critique.
I agree with alesoun, the blurriness is very distracting. and the figure is very very indistinct. I think maybe you need to work on getting your anatomy tighter and maybe using linear perspective or something to help you turn the environment into a really believable space. As of now it's not coming together on so many levels that I think you're probably best isolating them and taking time for fix them individual, then you'll be ready for this project when you come back Best of luck.
I have nothing interesting to say but here's my sketchbook, perhaps you'll think I've drawn something interesting XD http://www.conceptart.org/forums/sho...d.php?t=167964
For some reason the scaling of this piece really confuses me. I feel like the waterfall is really tiny compared to everything, and even if you did this intentionally my head says that it should be bigger.
One real issue besides the perspective is that you don't have any clear focal point. I mean I can kind of tell that the figure is where you want us to look at, but you didn't use any techniques to make it pop out besides making it sharper than everything else. Try moving it to a better area in your composition and use some contrast to make it more prominent.
In regards to your title I don't see much of a connection. I can see that there is a forest, but where is the hideout? I was expecting to see some kind of cave or structure hidden away. It would help us if you explained your idea behind your piece.
The way you have the river angled gives me the impression that it is sloping downwards, so fixing that might help. I feel that the river dominates too much of the composition, especially since you haven't applied any rendering to it. And lastly like the others mentioned, the lack of defined forms isn't helping.