No quit button :/

Once I can exit the game without having to shut off my computer to close the window, I will give it 5 stars. :( Did anybody else have the same problem? Could you ever find an exit button on the main menu or something like that? I pressed all the buttons on my Mac that goes out of full-screen allowing you to close it, but for this game it didnt let me. (f3 and f4)

Edit: You have to press Command + Q. It still needs a quit button. :/ Great game, though :D

Troll under me ¥ about Call of Mini - Zombies