you can run the watch to autorun compiler coffee -wc -o js/ src/*.coffee

without documentation yet, look the demo to understand the framework fast doc:

  general grafics objects
      method updade (recive the class context)
          it is call for each iteretion of the game loop. must update the object status
      
      method paint (recive the canvas 2d context)
          it is call for each iteration of the game loop after all the objects to be update
          
  Context (you need extends to custon yours objects and plugins)
      constructor
         create a game instance and the empty objects attribute (default list used by get Objects)
         you need call super at the first line to run
  
      method getObjects
          it is called to get all the grafics objects
          
      method required (recive a plugin class)
          it is used to requister a plugin
          
      attribute game
          represent the game istante for this context
          
  Loop 
      constructor (recive a Context instance, the canvas element and the game fps)
          prepare the game loop to start
          
      method start
          start the game loop
          
      method stop
          spot the game loop