Thank you. The mute button disappears when the scene changes and turns off, so sound comes on. There is a menu that I found, but it only allows you to go to the site, report a bug, continue, reset, or go to the facebook page. There is really no explanation about a free roam or the secrets. Plus the save feature does not work, though I'm not sure if the is my computer or not. I am running Windows 8.
If you finish the first date, you will see a button that looks like a joystick when you get back into Michael's bedroom. When you click on the button, you will enter free roaming mode.
The secrets are secrets, you can find them in the free roaming section but also in the story mode.