The project itself it fairly straight forward you can draw, move the phone by tilting in different directions, adjust line that you are drawing, create an animated line which pulses and re-draws itself and record an animated gif of whatever you make. Double-tapping (or hitting the trash icon in the menu) clears the app.
As an artist I'm constantly thinking about new types of drawing tools, and what does drawing in the 21st century look like -- ink space is research in that realm. If have a drawing basically in your hands, what does it look like to move around that drawing and experience more as a dimensional form that requires you to both draw and move.
Inkspace was built using OpenFrameworks (http://www.openframeworks.cc/) an open source C++ toolkit for creative coding that works on a variety platforms, including Android. On android (as well as platforms like the rPI) it uses a makefile system, which the eclipse IDE interacts with, to compile and run your app.
Here's a tutorial for how to get OpenFrameworks running on Android: (http://openframeworks.cc/setup/android-eclipse/)
You can find more of my thoughts on the creative/development process here: