Imagens:
    Silveira Neto, CC-BY-SA
    http://silveiraneto.net/2009/09/08/my-free-charset-version-6/
    http://silveiraneto.net/2009/07/31/my-free-tileset-version-10/

Musica:
    K McLeod CC-BY
    "The Terror Below - A dark driving exploration of tribal rhythm and evil"
    http://freesfx.co.uk/

Efeitos Sonoros:
    GPLv2 or later
    lmms (Linux MultiMedia Studio) - http://lmms.sf.net

Fonte:
    AtariSmall
    Licença no arquivo LICENSE.AtariSmall.ttf