This is really old now, but I just wanted to update that I've released the project code for this one here: http://ugotsta.github.io/nibble/
I actually didn't realize it was feasible to open-source a C2 project before, I thought the project files were binary/hex. The reason was that I was saving as a single-file, not realizing the multiple-file export creates xml files.
So, the project files are now available there. That includes the images and sound, both which are freely usable for other open-source projects. Feel free to contact me if you wish to use them for commercial projects.
Also, here's the updated Play link: http://ugotsta.github.io/nibble/play/