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by Corun 4354 days ago
It's actually my own engine. The whole game started out as an experiment in lightmapping, believe it or not. The graphics are OpenGL, the physics are chipmunk physics ( https://chipmunk-physics.net ), I used Sketch-up and Blender for the 3D design and Lua for scripting.

I'm planning on writing some articles on the process over the next few weeks which will appear on http://blog.helftone.com :-).