UI feedback

Before we're done, let's add a little juice to the user experience. We have a feedback cursor that lets you know what you're gazing at, and the cursor changes shape when the device recognizes your hand in view. But we do not have feedback when a button or clickable object is clicked. Let's add an audio feedback and some animation.

Click audio feedback

For the audio, find an audio clip you'd like to use when something is clicked. We include one named FingerPressed with our chapter Assets package. Rather than adding it with an AudioSource to every button and clickable object, we'll centralize the sound and add it to the GameController, along with a PlayClickFeedback() function:

1. Select the GameController in Hierarchy and Add ComponentAudio Source.
2. Find your audio clip, such as at Assets/SimpleIcons/Sounds/FingerPressed, and drag it into the AudioClip slot on the Audio Source component.
3. Uncheck Play On Awake.
4. Leave the Spatial Blend at 2D so it's not affected by the user's head position...