Fahrenheit: Indigo Prophecy Remastered (iPhone iPod)
CheatingDome.com
Stress meters
Watch the stress meters of each character. You can get a Game Over if a character is too depressed so engage in actions that boost their spirits.
Switch character
Sometimes you need to switch between Tyler and Carla to proceed. So do that.
Tutorial
You should play the tutorial. Not just because it is helpful, but because you get to see a little digital David Cage and that is always a treat.