We need to know more info to help you.
Which version of the game did you load; Collector's Edition, Humble Bundle download, or direct from
Amanita Store?
Also which Mac OS are you running ( Lion, Leopard, Tabby Cat, whatever... )
And on what hardware platform are you playing... G5, MacBook, IIci... ;>
obviously i'm playing around here a bit, but these
are questions we'll need have answers to before we can help you.