* C (reference version)
** DONE engine
** DONE UI
** TODO 
*** save current level
*** save scores
*** collect scores on server

* Javascript
** DONE engine
** DONE UI
** TODO 
*** save current level in cookie
*** save scores in cookie
*** collect scores on server

* DOING Ruby
** DOING engine
** TODO UI

* DOING Lua
** DOING engine
** TODO UI

* TODO CoffeeScript
** TODO engine
** TODO UI
* TODO Python
** TODO engine
** TODO UI