Oh, tell me which Configuration you used, it should have worked. Pharo3 or 4?
Its both it says host key verification failed, I think it fails because I have not set up the ssh keys for github on this computer I use just regular https which prompts me for user name and password. So most likely its not a problem at your side. This is a good excuse to set up the keys.
Don't hesitate to fork it and play all your content with the code. If it can help you build your dream IDE, I'll be proud :)
I have already forked because your project is ideal for making a new browser because of its so minimal GUI. I will remove the tree browse and maybe try a navigation similar to icon based file navigation or keep tree view as well as alternative, I have not actually decided exactly how I want to do this so what better than playing with your code. What I do know is that I like just as you did already to keep the GUI as minimal as possible and as compact. I also love that you cleaned up the menus this definitely stays. I see you also link a really nice documentation in the readme , is there any doc for the shortcuts ?