Press the arrow keys to walk around the game world. Holding SHIFT will allow the character to sprint. Press Z to select, and X to go back to previous option. Press ESC to open up main menu for you to save your game. Press F1 for more options such as Full Screen mode and changing the default keyboard controls.
Turn up your volume to immerse yourself further in the soundtracks and voiceovers.
Make your choices carefully, for they will affect the story line of the game.