In this Unity tutorial, developers are guided through adding a new scene, components such as Rigid 2D and Box Collider 2D to a sprite, destroying a game object by writing a C# script, and instantiating a prefab. The script is used to destroy the frog when tapped, but an error occurs due to an unassigned reference exception. Sentry, a tool for error monitoring, is introduced, allowing developers to track errors and monitor their game's performance. With Sentry, developers can view context about the issue, manage alerts, and resolve the error by assigning the explosion prefab in the inspector.