The Roll-a-ball Project is a simple rolling ball game that teaches you many of the principles of working with Unity.
The 4th of 4 tutorials in the project shows how to create the "Pick Up" collectables, place them on the play area, add a script enabling the ball to pick up those collectables, and make a simple scoring system. Finally, we demonstrate how to create a "build" of the game that will run outside of the Unity Engine.