How do you refer to @tileSize and @tile in the constructor there? They are undefined.

Static variables in CoffeeScript

class MapGenerator
  @tileSize: 20   # width and height of a tile
                  # should this be a power of 2 for WebGL TilingSprite?

  @tile:
    floor: 0          # clear floor that objects can move through
    wall: 1           # wall, creating an obstacle
    deadspace: -1

  constructor: (width, height) ->
    console.log(@tileSize)
    console.log(@tile.deadspace)

mg = new MapGenerator(10,10)