I don't know if this is a bug but...
In some computers it just doesn't open and go to a black screen, but the game is fully funcional in others computers, why?
you can play the game here: http://gamejolt.com/games/magos-e-patos/181522
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Although, considering the game does actually work on other computers then the problem is obviously with the computers rather than C2, most likely bad or old GPU drivers.