I literally got STUCK in Dear Esther - how do I get "unstuck"?

Just 30 minutes into the game I try to walk onto a rooftop for some reason... I promptly got stuck and literally can't move an inch. It's as if my walk buttons are disabled. Is there any way to get unstuck in this game, or will I have to start all over?

Note: this game is based on Valve's Source engine. Development console is enabled in the options, but I can't seem to manage to open it. It doesn't open when clicking the § key as it does in other Source games, nor while holding shift or control and clicking it.

I've restarted the chapter and walked onto the edge of the roof again, and yep, I got stuck. So it seems there's a bug a 5 minute walk into chapter 2 near the rooftop of a house where you get stuck. Here's a picture of the scene and above is a link to the game saves if somebody has trouble finding the spot. Hope it gets fixed! Also a configurable key-bind for the developer console would have saved me hours of frustration. I still can't open it.

Solution 1:

Open the config file and change toggleconsole to any key (I used "-"). Save the file, then right click on it, choose Properties, and set as read only. When in game, open the console and type sv_cheats 1, then noclip 1. Close the console, get out of where you were stuck, open the console again and type noclip 0. Worked for me!