The code and all project and datas, is open, and now available on Ghithub: 

https://github.com/iarwain/ld44

It can be used as a base for similar or future tutorials, prototypes, gamejams or full projects too!
(just don't forget a special thx in the credits if so).

The game is powered by the open source ORX game engine.
http://orx-project.org/

Enjoy!