In this section, we will look at adding three more buttons to our shop scene. The first is BUY? for when we want to purchase an item. The second is Watch Ad—as soon as the player presses this button, an advert will load; once it's finished, the player is rewarded with 300 credits. Lastly, the START button, which will take the player to the testLevel scene with the upgrades they have purchased (if any).
We need to head back to the PlayerShipBuild script and scroll down to the AttemptSelection method, where we will add three else if statements to launch three different types of methods. The reason for this is that the three selections don't follow on from the scriptable object buttons; therefore, these items will never have outcomes such as SOLD or itemText.
The following screenshot shows the complete AttemptSelection method with the focus drawn to the other three non-scriptable object...
