Adding tutorial hint text for the first level to get you started. Once you master this, it is basically the same system used through out the rest of the game.
And that voice is VERY much temporary. As you only want to record voice talent once, I have made system to automatically convert the text to speech in the build process using the Microsoft 'Text to Speech'; library. This means you can have place holder text whenever you change or add a hint or message, without a visit to the microphone.