I am playing the Mac version (updated today). The game is very well done but I need some guidance on game controls. After playing for about 30 minutes, I wanted to save the game and come back later and continue. How do you do that? When I came back to continue the game, it did not remember where I was or had accomplished nor did I see any dialog for creating a save. It keeps wanting to start the game over again. When I hit the escape key, I do see a dialog "do you want to quit" with a "yes or no" plus another sentence that says "hit escape again to quit" but nothing that says "save" or "continue". Is there a quick save key, like F5??? Thanks.