Time for action – create the HeartBounce script

We need to attach a new script to the heart. The script will respond to two important situations: when the heart hits the tray, and when the heart misses the tray completely and dive-bombs the Great Beyond. Let's create the script and add some simple code to it.

1. Right-click/alternate-click the Project panel (or use the Create button) and choose Create | JavaScript.

2. Rename the new script HeartBounce.

3. Double-click to open the script in the script editor.

4. Add the following code to the top of the script above the Update function:

   function OnCollisionEnter(col : Collision) {
     if(col.gameObject.CompareTag("tray")) {
        Debug.Log("yes! hit tray!");
     }
   }
   

What just happened – charting a collision course

There's some new code happening here. OnCollisionEnter is a built-in function that gets called when the GameObject's collider touches (or collides with) another GameObject's collider, as long as one of those colliders is attached to a GameObject with...