I remember jumping up a tree and then jumping off of it into trees the look like the ones in the picture.
Also I found rocks that I could jump on top of and then i could walk until i found the edge of the map. Here is a picture of where i ended up. I think this game is very good and I had a lot of fun playing I just like to try things like ending up where i am not supposed to be sometimes in games. I wonder where i could end up if i keep on trying.